Genjitsubanareshita Bishoujo Tenkousei ga, Oya no Kimeta Doukyo Aite de Komaru

A high school boy living independently as the fourth son of a wealthy family finds his life changing when his fiancée moves in due to her parents' situation. Expecting a delicate and sheltered partner, he discovers she is highly proactive in managing their household, offering to cook, clean, and improve his lifestyle. While she is admired at school for her perfection, at home she is devoted and attentive, creating a dynamic of both comfort and challenge. Their shared living arrangement leads to a comedic and sometimes exasperating relationship as they navigate life together.