One summer, in the classroom of Grade 1 and Grade 5, Ji Suixin, Jiang Han and Ning Chen met. The fate of the three people began to be closely entangled. There is no gorgeous fairy tale about the prince and Cinderella, a touch of joy, casual love, inevitable hurt, emotional entanglements that become more and more complicated as you grow up, you can't see clearly the playboy's heart, you can't avoid the entangled love, just let everything go as you like.