Kōhai to bushitsu kara dasshutsu suru gēmu

Kōhai to bushitsu kara dasshutsu suru gēmu is an adventure game created by the mangaka Nanashi. It is based on characters from Nanashi's webcomic Nagatoro-san (who would later appear in the manga series Don't Toy With Me, Miss Nagatoro). The game stars the manga's main characters, Senpai and Nagatoro, who is called "Kouhai" in the game.

Senpai, a member of the high school art club, wakes up in the club room. As usual, his Kouhai, a lively and mischievous girl, has shown up to keep him company and tease him mercilessly. More alarmingly, someone has locked the exit door with a bike lock (when asked, Kouhai makes the most innocent of faces). Senpai now has to search the club room for the key. As a side quest, he can look for art supplies to draw a picture - now if only he could find someone to model for him...

This simple adventure game consists mostly of inventory-based puzzles.