On the verge of turning 30, Hoshino Rin, a “kind but unfortunate girl who takes care of others”, is at rock bottom, with neither a job nor a boyfriend. Through her older brother’s introduction, she begins working as a housekeeper for Wakatsuki Iku, a genius programmer. However, the person she is assigned to is the very same “mysteriously insensitive man” who once ruined her marriage prospects. Although their relationship begins with the worst possible reunion, the housekeeping contract eventually comes to include a “romantic partner contract” as well… A doting love story filled with strong possessiveness, led by an awkward “genius,” begins!