Imagine yourself, an otaku weeb shut-in that only plays R18 games. You open up steam and see a recommended game for you: "HuniePop". You adjust your reclined seat and brush the chip crumbs off your shirt. You squint at your moniter as you read the synopsis of the game. You feel a sudden urge to buy and install the game. Your intuition wasn't wrong!

You boot up the game and find youself face to face with a cute pink haired girl that finds her way into your bedroom the following morning. She reveals the fact that she's a fairy and wants you to absolutely ravish some girls in the neighborhood with your insane bejeweled skills. You progress through the game and find yourself forming a soft spot in your heart for the characters. You beat the game. You want more. Some kind of primal intuition is screaming at you to continue playing. You find an unlocked Alpha difficulty to conquer. You relax your body in your chair and allow the game to fully encapsulate your mind.

TL;DR - Literally just buy the game you shut-in. You know you wanna play a fun puzzle game with extremely lewd girls in it. Don't even lie to yourself.