The main character has never communicated or had any sexual experience, and in general there is absolutely no experience of communication with girls because of the deep psychological trauma received in childhood. His beloved Kasumi is getting married soon. He is lost and upset. The hero runs where his eyes are looking and suddenly loses consciousness. He wakes up from the pain of a familiar voice – ‘Boku-kun! Boku-kun! It was a voice from his beloved sister Kasumi’s childhood. Stop! This is Kasumi, who is still very young… He had a chance to go back in time and become what he dreamed of becoming all his life. However, after not long reflection, he understands that he has no time to dream and decides to make all his lustful dreams come true….