Rino's mother's younger sister, Mirai, suddenly turns up at her house. She's a lesbian. Apparently she broke up with her girlfriend who she was living with and left home. Mirai's sudden kiss, and feels awkward and begins to avoid Mirai. Rino has been living with her mother ever since her parents divorced due to her father's infidelity. Her mother has always been on her lesbian sister's side. Eventually, Rino...