58-year-old Ayumu Tada, whose beloved daughter's wedding is coming up soon, is an ordinary office worker who has no interest in anime. While holding the distance between his anime-loving daughter and son-in-law, he suddenly slips back in time to his third year of high school 40 years ago. In the past you should have known, there was a figure of a classmate who later became a famous animator!? Showa anime youth story!