Popular games for franchise 12-Sai

12-Sai. Torokeru Puzzle Futari no Harmony is a Puzzle game, developed and published by Happinet, which was released in Japan in 2017.

A Happinet developed Nintendo 3DS romance adventure game based off the manga and anime Age 12

12-sai: Koi Suru Diary is a visual novel for the Nintendo 3DS and is based off the manga 12-sai.