Backstory: Yumi Yosimoto is a real garbage in your class. She's a simple girl, but everyone humiliates her and mocks her because of her simplicity and because she has no parents and lives with her grandmother. She is very kind, smart but shy. You are a school student and its classmate. One day during the break you decided to walk on the roof, but when you came to the roof you saw a crying Yumi Yosimoto. What will happen next? What will you do?