Replica Datte, Koi wo Suru.

When Sunao cannot face school, a girl created as her substitute quietly takes her place. She looks the same, answers to the same name, and is meant to exist only when Sunao needs her, with no one around them realizing that another self has stepped into the classroom.

Her borrowed everyday life begins to feel less simple after a classmate, Sanada, notices the difference between her and the original Sunao. As their time together grows more personal, the replica starts to discover emotions that belong to her alone, bringing a gentle supernatural edge to a school romance about identity, growing up, and the fear of wanting a future she was never promised.