Natsu-Mon: 20th Century Summer Kid

Natsu-Mon: 20th Century Summer Kid

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Natsu-Mon!100% Achievements Guide + DLC
By Fᴜᴛᴇᴊɪᴀ +
This guide is only applicable to the current Steam version and contains some spoilers. It is intended for players who wish to play the game for a second time or more and complete all achievements.
It is highly recommended to freely explore and finish the first playthrough before reading this guide! Following the guide strictly on your first playthrough can significantly reduce the enjoyment of the game.
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introduction


This guide is only applicable to the current Steam version and contains some spoilers. It is intended for players who wish to play the game for a second time or more and complete all achievements.

  • It is highly recommended to freely explore and finish the first playthrough before reading this guide! Following the guide strictly on your first playthrough can significantly reduce the enjoyment of the game.

To easily locate an achievement, you can use Ctrl + F to open the search box and type in the achievement name.

If you notice any errors or have questions, please leave a comment to let me know! Thank you for reading🌻

Other language versions Guide
中文玩家請點擊這裡↓
100%全成就中文指南
.Bronze Sticker
⚡.Acrobat in Training
Collected 10 or more stickers

⭐.Rarity Found
Made a donation to the museum for the first time

🏛️.First Appraisal
Had a Mystery Object appraised for the first time

🪽.To the Sky!
Obtained Tengu's Cape
※ After arriving at the cabin in the mountains and talking with Mountain pops, get the cloak.



🪙.A Small Fortune
Obtained a total of 30,000 yen or more
※ Recommend raising piglets
you can earn ten thousand yuan for each pig you raise to adulthood.

🐖.First Piggy
Caught a pig for the first time
※ piglets are mostly found near oak trees

🐟.Smells Good...
Had a fish dish made for the first time (excluding DLC)
You can refer to this guide for fishing locations

🗿.Mystery Appraisal!
Had 30 or more Mystery Objects appraised

🎠.New Circus Prop!
Obtained circus gear for the first time

🕺.Dance Like You Mean It!
Participated in the Bon Festival dance
※ It will be held in Drumming park on the evening of August 15th.
After talking with Junko, we can dance together.

📢.First Ad
Had an ad posted on bulletin boards
※ Unlock as the story progresses and find a reporter to promote it.

🎇.Flowers in the Night Sky
Saw all types of fireworks
※ You need to watch a complete round of all types of fireworks until the achievement pops up.
Can’t just leave halfway to go to sleep

🚌.On a Bus Trip
Located all bus stops
※ There are a total of 15 locations. It’s recommended to investigate all the bus stops in the first round of the game, play round 2 you can easily teleport on the map.
.Silver Sticker
⚡.Acrobat
Collected 25 or more stickers

💰.Millionaire
Obtained a total of 100,000 yen or more

🎭.Mirage Circus Troupe Ad!
Had all ads made[
※ Unlock as the story progresses and find a reporter to promote it
A total of 4 advertisements are needed to complete it.

👺.Little Tengu of Yomogi Town!
Collected all Tengu treasures

🏅.Exercise Attendance Award!
Attended all radio exercises
※ Every morning do the exercise at the shrine until the last day.

🔆.Adventure Buff
Completed all Little Adventures (excluding DLC)
※ Please note that some side quests have time limits, if you don't complete them on the same day, you will miss the chance to finish them.
(Time limited quests usually involve following NPC in Little adventures.)
.Gold Sticker
💲.Billionaire
Obtained a total of 500,000 yen or more
※ You can only earn rewards in one round of the game; during the second playthrough, you won't be able to carry over the amount of money from the previous round.

🖼️.Town Rarities Hunter!
Completed the museum exhibits
※Please check Bug Guide Fishing Guide



🦈.Fish Galore!
Had all fish dishes made (excluding DLC)

🧭.Elite Adventurer
Completed all Big Adventures (excluding DLC)

📚️.Town's No. 1 Collector
Completed all encyclopedias (excluding DLC)
※ Includes insect、fish and item catalogs.
.DLC Achievements
You need to have the DLC to unlock it.

🛥️.[Broadcast Over Sunset] Island Ho!
Reached Sunset Island

📻️.[Broadcast Over Sunset] Town's No. 1 Listener
Listened to all radio programs
※ If you talk to the DJ and repair the antenna on the first day, you can listen to all the broadcast programs by the evenings of the 1, 3, 16, 19th.

🔫.[Broadcast Over Sunset] Bullseye!
Got a perfect score at Sunset Island's shooting gallery
※ You need to defeat all target objects within the time limit.
It’s quite challenging, so please try multiple times!
You can take on the challenge after getting the rapid fire toy gun from the Yachigashira professor, which will make it a bit easier.

⚡️.[Broadcast Over Sunset] Master Acrobat
Collected 54 stickers
※ Complete all Big Adventure and Flatfoot Files missions
➤ All Endings Achievements🔚
Due to the fact that this game’s endings(Epilogues) are determined by priority weighting, players cannot freely choose which epilogue to complete when multiple ending conditions are met at the same time. Therefore, if you are not aware of the unlocking conditions for each ending, you may find yourself needing to replay the game many times to achieve them all.

🎨.My Own Art Style
Watched Epilogue "Art Teacher"
You need to collect a total of 446 drawing diaries, which include dialogue events, insects, fish, and item catalogs. Priority level:A
This is the most challenging part of the game. In the second playthrough, the diary inheritance only includes insects, fish, and items you have obtained. Since the drawing diaries for dialogue events cannot be directly inherited, missing even one will essentially require you to start over.
🦋.Buggy Bug Bro
Watched Epilogue "Entomologist"
Complete the collection of all insect catalogs.
Priority level:B

📖.Recounter of Lore
Watched Epilogue "Storyteller"
Find all 30 Zashiki-warashi
Priority level:C

☀️.21st Century Natsu-Mon
Watched Epilogue "Mountaineer"
Complete the "Reach for the Stars!" mission.
Priority level:D

🎪.I'm the Circus Leader
Watched Epilogue "Ringmaster"
Achieve max star level in circus management and purchase all costumes and props.
Priority level:E

🔍.Detective Yoyogi Shibuya
Watched Epilogue "Mystery Writer"
Complete All Flatfoot Files missions (excluding DLC)
Priority level:F

💼.Detective Yoyogi Shibuya
Watched Epilogue "Ordinary Person"
None of the above ending conditions have been met.
Priority level:G

  • DLC Added Endings
You need to have the DLC to unlock it, but the priority determination for the endings is currently not very clear.

🚀.[Broadcast Over Sunset] Sailor of Space
Watched Epilogue "Astronaut"
Complete the DLC-related events and quests.
Priority level:?

I originally thought its priority would be higher than Storyteller, but after completing the Art Teacher ending, I went back to load my save and intentionally skipped one event diary entry. The DLC Report Card was 100% complete, yet the ending still classified me as a Mountaineer.

During my fourth playthrough, I didn’t complete the majority of the timed events and quests, only finishing the DLC-related tasks and events. I was missing a few drawing diaries from the DLC Report Card, but I still unlocked the ending successfully. To test this, I loaded a save from a few days earlier and completed all the climbing and Flatfoot Files tasks, but I still ended up with the DLC ending.

So, I suspect it might be related to the percentage of completed timed events and regular tasks, as I only caught the fish needed for the DLC in the Fishing Dinner task.

If you have more clues, please leave a message to let me know , Thank you very much!


  • How can I collect multiple endings in a single playthrough?
The currently recommended method is to keep one condition for each ending unfinished and then selectively complete them based on your situation during the last three days of the game.

For example:
.Leave one climbing task location unfinished
.After finding 29 Zashiki-warashi, keep the last one
.Hold off on buying one circus prop... and so on
Save your game in the last 3 days and selectively complete one of the tasks. After triggering the ending, load a save from a few days earlier where you haven't completed another task. This way, you won't have to replay the entire game and can save a lot of time.

【2025.1.6 Update】
If you encounter difficulties in collecting all the conversation diaries and DLC diaries, you can refer to the guide written by @CALVIN COUSCOUS:
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3401498430
➤ The Encyclopedia of Items📜
  • To help you check the items you have not yet obtained

  • The items added in the DLC can generally be obtained by completing the relevant tasks from Yachigashira Professor . There is also a Zashiki-warashi in the Hideout on Sunset Island that will invite you to play a shooting game. If you meet the score requirements, you can receive its doll and a diving suit.
  • The circus dolls can be obtained during the festival held in the middle of the game. Once the booths open, you can play the pinball and shooting games to reach the specified scores to receive them. To get Love-chan doll, you need to purchase it at the toy store, while Junko's doll can only be won in the shooting game after triggering her performance scene at the circus.

Even if you don't completely collect everything in one playthrough, it's fine as long as you plan to play a second time or more. Except for the dialogue event diaries with the residents, the records for insects, fish and item catalogs can be directly inherited for you to continue searching. However, functional items will need to be repurchased and you'll also have to earn money again
  • About the insect and fish Encyclopedia
※Please check Bug Guide Fishing Guide
➤ Locations of Tengu treasures👺
  • The Map


1.Kurama-tengu's Pistol
in the Sea beside

2.Geta
The position above the Weathered Mural
  • Reference Map:

4.Ushiwaka-maru's Sword
Located at the highest point of the town Clock tower, you can easily grab it while completing the climbing task.

3.Feather Fan
Teleport to the area near the ljin pass bus stop, located in front of the large tree on the small slope next to it.
  • Reference Map:

5.Kongou Staff
Located at the highest point of Tengunoyama, you can easily grab it while completing the climbing task.

6.Mino Cape of Hiding
Hanging on the mast of the Sunken ship, you can swim to the nearby rock and fly over to grab it.

7.Mummified Tengu Nose
Teleport to the area near the Patchwork Woods and head toward the direction of Yomogi Valley shown in the map.
  • Reference Map:
➤ Locations of Fossils ⛏️
  • The Map


1.Ammonite Fossil
A total of 2 fossils are needed for the museum exhibition, located on the hillside behind the Weathered Mural.

2.Wolf Fossil
A total of 5 fossils are needed for the museum exhibition, located on the hillside next to the mountains above Treasure Mountain.

3.Elephant Fossil
A total of 7 fossils are needed for the museum exhibition, located on the hillside near the Tonari Mountain.

4.Whale Fossil
A total of 7 fossils are needed for the museum exhibition, located on the hillside platform near the Patchwork Woods.

5.Plane Fossil
A total of 7 fossils are needed for the museum exhibition, located on the hillside platform near the Castle Hill.
※ On the eve of the festival, the stalls will open a specialty shop for buying and selling, where you can purchase 3 fossils from Ryoko in front of the stall to have them appraised.

The appraisal is based on probability, so if it turns out to be junk, you can just take it to the store to sell. The fossil digging points will refresh every morning, so you can go dig and check for appraisals every day until you achieve your goal.
➤ Locations of Zashiki-warashi🎎
✦ Mount Donzumari
Located on the cliff face, requiring climbing to find.
  • Reference Map:

✦ Tonari Station
  • Reference Map:

✦ Tonari Town
  • Reference Map:

✦ Corn Field
You need to find the entrance and go inside.
  • Reference Map:

✦ Weathered Mural
  • Reference Map:

✦ Flowery Field
  • Reference Map:

✦ Apiary
  • Reference Map:

✦ Tori-i island
  • Reference Map:

✦ Lighthouse Cape
Inside the cave, you can hear its voice.
  • Reference Map:

✦ The gravestone at Lighthouse Mountain
After jumping down from the gravestone at Lighthouse Mountain, fly to the right and you'll see it.
  • Reference Map:

✦ Lighthouse Cape
Located roughly halfway up the mountain.
you can see it by walking a bit forward from the previous point
  • Reference Map:

✦ Yomogi Station
  • Reference Map:

✦Toy Shop and Yukimi-ura
Located in the gap between the railway and the road
  • Reference Map:

✦ Yomogi Town
  • Reference Map:

✦ Shrine Pathway
  • Reference Map:

✦ Abandoned Station
  • Reference Map:

✦ Chimney Mountain
  • Reference Map:

✦ Cabin in the mountains
  • Reference Map:

✦ Tengunoyama
  • Reference Map:

✦ Patchwork Woods
You need to stand on the tree stump and use the toy gun to hit the ball in a parabolic arc.
  • Reference Map:

✦ Yachigashira Residence
  • Reference Map:

✦Field with Ponds
  • Reference Map:

✦Twin Stone Monument
Located on the cliff face, requiring climbing to find.
  • Reference Map:

✦Yomogi Falls
In the waterfall cave
  • Reference Map:

✦ Eevated bridge
Underneath the elevated bridge in front of Yomogi Falls.
  • Reference Map:

✦ Underbridge Park
  • Reference Map:

✦ Town Museum
The house behind the Town Museum.
  • Reference Map:

✦ Town Museum 2
Under the bridge connecting the museum to the cemetery.
  • Reference Map:

✦ Town Cemetery
  • Reference Map:

✦ Old Castle
  • Reference Map:

If you find them all, there are a total of 30 Zashiki-warashi.
💡Note:Tips for Collecting all Drawing diaries
Basically, just make sure to talk to the residents daily to trigger and complete the events in the process. You can use any extra time to freely complete various tasks or collect items in the catalogs.

Adjust the in-game time flow according to your collection situation; you can speed it up or slow it down at any time. Of course, playing multiple playthroughs makes collecting easier. But it can be very time-consuming

Except for the DLC-added endings, whose priority determination is not very clear, it is recommended to play through at least a second time to ensure you unlock them.

Other ending conditions can theoretically be retained in the same playthrough until the last three days of saved progress.


Dialogue diaries that are easy to miss typically require continuous and timely conversations; after that, no matter how much you talk, you won't be able to obtain them. Try to talk to the residents whose avatars are displayed on the map as much as possible during the weekdays.

After Love-chan joins on the sixth day, you can ask her to do divination daily, which will also give you hints about some important events.


  • On 8/4, talking to the mother in front of the station will grant you a diary about the names of the port birds.
If you don’t receive it immediately after the conversation, you need to keep trying to talk to her before 8/20 until you get it. After the 20th, it will no longer be obtainable.
  • From 8/5 ~ 8/6, you need to talk to Junko and the reporter in front of the bookstore for two consecutive days to trigger a dialogue diary.
You must first investigate the crime scene above the coffee shop roof.
  • On 8/6 ~ 8/7, you must talk to TokoToko-Kun on the second-floor corridor for two consecutive days to trigger his diary with Love-chan.
If you don’t receive it immediately after the conversation, you will need to keep trying to talk to him until you obtain it.
  • From 8/10 ~ 8/13, go to the bell tower and talk to Chiharu; you need to have a conversation with him for three consecutive days to obtain the urbanization diary.
If you don’t receive it immediately, you must keep trying to talk to him before the 17th until you get it. If you miss the deadline, you won't be able to obtain it.
  • On 8/16, talking to the coffee shop owner will trigger a little adventure of delivering coffee beans.
Only the first trigger will result in a drawing diary, and there will be another chance later that you can choose not to complete.
  • From 8/26 ~ 8/30, you need to talk to Nagase in the tent for five consecutive days during the daytime to trigger a drawing diary about the circus name.
Missing even one day will mean you can’t obtain it. On the 28th, he will run to the park to listen to the band play after morning exercises, so you won’t be able to talk to him then, but it won’t affect your progress.

Tips for Little Adventure Tasks
  • The coffee shop concert can have all tracks listened to the fastest on the 1st, 9th, and 16th.
  • The park band's concert can be completed on the 8th, 15th, and 22nd.
  • The evening broadcast from the Sunset Island radio station can have all programs listened to the fastest on the 1st, 3rd, 16th, and 19th (DLC).
This is a rough overview, for DLC-related dialogue events, just talking to Tei-kiatsu and Tobiyame will ensure you don’t miss anything.
Fin.
「Goodbye! To that Summer in our memories, To all the boys and girls of the 20th Century.」
23 Comments
sabeerareeb™ 5 Jul @ 7:10am 
how to do the dlc quest line
Im stuck
Soulbreaker 10 Jun @ 2:40pm 
okay so what do you have to put as an offering for the zashiki warashi near the torii gate island? It says I can put in a wriggly offering? Does the spirit want a worm or something?
Isak 12 May @ 8:32am 
Wow thats a really stupid system. will be going for 99% completion then on everything and cash in all endings at the same time. Thank You for writing a pretty well done Guide btw.
Fᴜᴛᴇᴊɪᴀ +  [author] 11 May @ 10:53pm 
@Isak
In a single save file, you can only trigger one ending.For example, if you meet the conditions for both Ending B and Ending C in your first playthrough, the game will give you Ending B.
So in the second playthrough, if you want to get Ending C, you must avoid fulfilling any conditions that would trigger Ending B or higher. Otherwise, the system will still give you Ending B.
Isak 11 May @ 4:32pm 
Will each ending Only trigger once on a Savefile? Or will it trigger the same ending again if i want to grab an ending with a lower priority in the next NG+? would you then need to reset that endings criteria? This is really confusing me.
Mousekateer627 7 Mar @ 1:08pm 
So it turns out the big adventure I was missing was the fireworks quest. It was the only big adventure quest that was very easy to miss because unlike the others I had to talk to that npc several times and it had a time limit. I found that out in a Japanese guide and @CALVIN COUSCOUS was more thorough.
Anyway I should hopefully be on my way to 100% with yours and Calvin's guide in hand. Once again thank you for the helpful guide and thank you so much for quickly responding to my questions.
Fᴜᴛᴇᴊɪᴀ +  [author] 4 Mar @ 8:59pm 
OK, thank you for the feedback. Unfortunately, it's been too long, and I can't remember all the Big Adventures tasks. If you still have issues with collecting the diaries, you can also refer to the guide written by @CALVIN COUSCOUS. Check if you missed any records of conversations with NPCs. Good luck!
https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=3401498430
Mousekateer627 4 Mar @ 4:44pm 
So I checked the report and I have 35/40 on Big Adventures. But I've completed what showed in my Adventures notes unless I haven't talked to all NPCs I'm not sure where I've missed the last five.
Mousekateer627 4 Mar @ 3:13pm 
I finished the fish, insect and fossils, Admittedly I don't check the report card so I'll check what I'm missing.
BTW, I found out that I could still get the Buggy Bro ending at 208/210 insects caught. I got the rest of the endings at with a save with 196/210 insects caught so I just thought this info might be at least good as a warning.
Fᴜᴛᴇᴊɪᴀ +  [author] 4 Mar @ 3:31am 
Is it the fish, insect encyclopedia, or fossils that haven't been completed? If you plan to play the My Own Art Style ending, completing all the missions and fully collecting the encyclopedia should allow you to unlock it smoothly.

This is my notification record after completing the game. Please refer to the part that contains the stickers.↓
https://imgur.com/a/hpmYC3g