Haruki Takahashi, a teenage boy grappling with profound loneliness after his best friend Kazuki moves away finds a missing cat, which becomes a catalyst for change in Haruki's life.

After returning the cat to Moriko Sakurai, the owner of the lost cat. They start to bond over their shared love for cats and their mutual longing for companionship. Their conversations evolve into frequent interactions, and their friendship deepens as they spend time together, getting to know each other on a more personal level.