Kaji Daikou no Arubaito wo Hajimetara Gakuen Ichi no Bishoujo no Kazoku ni Kiniirarechaimashita.

Haruto Otsuki takes on a housekeeping job during the summer break of his sophomore year in high school. His very first assignment brings him to the home of Ayaka Tojo, the school's most renowned beauty. Though thrown off by the unexpected coincidence, Haruto diligently fulfills his duties. As time passes, he earns the affection of Ayaka's entire family and becomes a frequent presence at their home. Through shared moments away from school—preparing home-cooked meals that never fail to please Ayaka, grocery shopping side by side like a newlywed couple, and nervously attending movie outings like young lovers—their relationship steadily deepens.