Sotsugyō Bangai-hen: Nee Mahjong Shiyo!

Sotsugyō Bangai-hen: Nee Mahjong Shiyo! ("Graduation Side Story: Hey, Let's Play Mahjong!") is a spinoff of Graduation that combines the story and concept of helping a group of students graduate high school with mahjong gameplay. The main story mode follows one year of helping the students, with the teacher helping one group of three students each month; this takes the form of a game of mahjong, and each girl's stats are affected by their ranking in that month's game, which in turn affects which ending they get. There is also a free battle mode where the player can pick any three characters to play against.