Yuukai Sare Sou ni Natte Iru Ko wo Tasuketara, Oshinobi de Asobi ni Kite Ita Ohime-sama Datta Ken
誘拐されそうになっている子を助けたら、お忍びで遊びに来ていたお姫様だった件
A high school student named Kiriyama Seito encounters a kidnapping during summer vacation and saves a girl named Luna from being taken. With no place to go, she stays with him, and they begin living together. As they spend time together, Seito grows increasingly fond of Luna, who is graceful, stylish, and easygoing. When the new school year begins, Luna enrolls in Seito's class as an exchange student. It is later revealed that Luna is a princess from another country, highly admired to the point of receiving marriage proposals. As their relationship develops, Luna expresses her feelings exclusively for Seito. The story follows their growing bond in a lighthearted and affectionate romantic comedy.