(Update 01/19/2022) A long review even though I am still exploring the mechanics of the game.
PROS:

• The game has great visual, particularly the Manhwa art styles for a Korean game.
  
• The story is beautifully told in Visual Novel style.
  
• The gameplay is GOOD with HIGH replayability [char builds], given how many masteries (passive parks) you can gain.
  
• The addition of CHALLENGE mode is highly recommended for veterans at turn-based games.
  
• The choices you make throughout the game DO give a tiny different outcomes (buffs, new members joining the battlefield).
  
• Varieties of enemies and bosses to encounter in a turn-based game (even though some mini-bosses are just reskin of underlings).
  
• The AIs are relatively competent (use cover/grenades/buffs). Thus, you can give AI control the supporting characters to ease up the work.
  
• The DEVS DO ACTUALLY READ PPL REVIEW AND TAKE IN CRITICISM & FEEDBACKS SERIOUSLY!!!! YOU DON'T GET TO SEE THIS EVERYDAY!

CONS: *mostly personal opinions, CAN BE IGNORED*

• The lack of Voice Acting. No surprise given the budget but I hope it will be implemented in the 2nd season (Korean VAs only? I do know some prefer ENG dubs)
  
• The 3D models of the main cast are inconsistent. We have Albus, Sion, Irene look like high schoolers who skip classes playing vigilantes. Comparing with free DLC WHITE LION AND BLACK WITCH, they are more polished and fit better to their respective artworks and ages. I hope Dandylion will update it for the sequel?
  
• Unbalanced Crit Chance Modif. Should be nerfed bc it makes the game quite easy for HARD difficulty (I managed to beat Ryo first try despite the lvl gap is 15+?? Hello??) - THIS NEEDS BALANCING.
  
• Forgettable OSTs. Most ppl like it so I guess it comes down to preference. The STs do not have the futuristic urban cyberpunk given the setting.
  
• The ENG translation is OK but iffy at certain dialogues (Never see someones call their boss including first name/nickname- Boss Sharky??) - could need improvement.
  
• Janky animations, imagine following the Vahalla policeman bunny hopping onto the crates OR Irene front flipping every crates while climbing up in 3rd person view. The Devs do improve them through updates.

TL, DR: Just buy the game to support the devs in hope of getting the 2nd season in addition of 50+ hours of additive gameplay. MUST BUY if you like to play X-Com2 (heavy influence).

P/s: Dandylion if you read this, at least CONSIDER these in the future-
+ ADD a seperate tab/ page as JOURNAL in SEQUEL to record all the information of the pro/antagonists with ???? and let it filled as story scenarios progress. As player, I do want to read more about their biography for immersion.
+ MAKE PAID COSTUMES DLCs (Bikinis, swimsuits except ANNE) since there quite a lot of females in the main cast. This way you can finance the development as I strongly believe MOST players DO NOT MIND (shut up and take my money.jpeg).
+ The vertical terrain, obstacles(walls, BIG vehicles) are not accounted in the line of fire (both teams can shoot through invisible cars or wall like they never existed). Same thing happen with explosion coming for Fire Veil buff. Hope you guys can find a solution to this issue.
+Far-fetched mods support. Maybe after the story is completed? The longevity of successful game comes from its community so no further explanation needed,