One day, the main character, Enami Shusuke, a company s*ave, has a seizure and loses consciousness. When he wakes up, he finds that he has time leapt back to 10 years ago. Moreover, it was the day his childhood friend Yorumiya Hina was involved in a traffic accident. He remembers his regret of not being able to save her and rescues her. Somehow, he ends up becoming her fiancee. From there, his student life changes from what it was before the time leap. His childhood friend becomes much more close, and somehow there is an idol at the high school he entered and they become good friends. …… don’t care about me, I just want my childhood friend to be happy. This is a story about the main character who tries his best for his childhood friend and redoing his youth.