She is the granddaughter of the prestigious shogi master Kanade Fuuga, and despite her youth, she is a certified women's professional shogi player recognized by the league. However, during a match against her shogi club's advisor, she is tormented by his malicious move and suffers an unexpected defeat. Proud and determined, she demands an immediate rematch, but the teacher sets an impossible condition: "Come to my house tonight, and I'll play you." That night, what kind of game—and encounter—awaits her?