Katagiri suddenly woke up and returned to twelve years ago. During this silly and happy childhood, Kise Ryota was Katagiri's best brother, although Katagiri only believed that there was only friendship between them. Regarding the current Kise Mitsuki Midori, he wants to be rude: What the hell, I treat you as a big brother but you want to flirt with me? ? ? Mitsuki Midori feels that her eldest brother, who is so mysterious, may still be living in a dream. This is a strange story about someone who falls into a dream and saves people [laughs] Pseudo-comic, mainly black basket