His parents took a job transfer and he is staying behind to finish school — his own apartment, his own routine. The arrangement requires a roommate. At the start of the game, the player selects one of three girls to share the space with: Sakura, Tiki, or Miki, each with her own story and her own way of navigating the situation. Daily school life and the decisions made in conversation gradually shape the dynamic between them — how she feels about him, what kind of relationship develops, and how the story resolves all depend on small choices accumulating over time.