The story of the main character with "Dementia" overcoming conflicts with his family and making his debut as a drummer of a rock band, which he dreamed of as a young man. He reconciled sincerely and returned to that time of his first love.

主人公患有“年轻痴呆症”，克服与家人的矛盾，通过摇滚乐队的鼓手出道，真诚地和解，童年的梦想，回归初恋的故事。