Yuu, living in a dormitory at a private school after leaving her family home. Her meaningful student life is coming to an end, and graduation day is finally here. Her parents couldn't make it due to work, and she was supposed to spend the day alone, but who should arrive with a smile from across the street but her stepmother, Rei. That night, after celebrating her graduation alone with the woman she secretly admired, Yuu gave Rei a gentle kiss as she sent her off at the hotel, saying, "This is my graduation gift for you..." And so, he took another step towards adulthood.
