Teacher, let's play a game with me. Tachibana Aya, a substitute teacher newly assigned to Ata Academy, decides to accept a challenge proposed by Takeda, a highly intelligent but reclusive student, in hopes of bringing him back to school. Takeda presents an unreasonable condition: "If you win, I'll come to school. But if you lose... you have to take off your clothes." Hesitant at first, Aya nevertheless agrees, and the game begins. A unique situation unfolds between the reclusive student Takeda and the teacher trying to bring him back. As Aya's intellect clashes with Takeda's hidden intentions, a story filled with tension and humor gradually develops.