Kara Nanime [updated]: Shinseki No Ko To O Tomari De

. Like many titles in this genre, the story begins when the protagonist is tasked with hosting or living with a relative—often a younger cousin or distant family member—due to parental circumstances or school transitions. The Transition of Roles

(Possibly: "From staying over with a relative's child, nothing happened..." or a variation thereof) shinseki no ko to o tomari de kara nanime

When in doubt, pick a Ghibli film. Totoro never fails. shinseki no ko to o tomari de kara nanime