This time, Shouta-kun's target is the adorable smile and, above all, the particularly noticeable owner of large breasts, "Shiiba Mikuru-chan." Shouta was recommended to use a minpaku (private lodging) by his parents and decided to go to Tokyo... Despite the anxiety of interacting with unfamiliar family members, Mikuru, who has bouncy breasts, lived at the minpaku, and Shouta began to think about playing lewd pranks on her breasts.
