High school student Yuki Hase (Kento Yamazaki) wants to become close with classmate Kaori Fujimiya (Haruna Kawaguchi) who is alway by herself. Kaori Fujimiya refuses to become close with Yuki…

Story follows high school student Saki Miyanaga and her classmates as they become absorbed in the game of mahjong. They target an upcoming national competition.