Asahi Motoori is a twenty-five-year-old woman who makes a living as a full-time housekeeper. She takes deep satisfaction in her work, believing her calling is to put everything back in its proper order. When she goes to a mansion for a new housekeeping job, she discovers that the residence belongs to her childhood friend Nanaie Kataru. Asahi and Nanaie had promised to marry each other when they were in elementary school, but they were separated before the pledge could be fulfilled. Asahi is thrilled to be reunited with the person she has never stopped thinking about. Her excitement quickly turns to dismay when she learns that Nanaie now has five lovers. Because Asahi has moved into the mansion as part of her job, she finds herself living under the same roof as Nanaie and his other romantic partners. A love survival battle unfolds as Asahi competes with the other women for the chance to reclaim the childhood promise of marriage. The story follows her efforts to restore not just physical spaces but also the relationship she thought was lost, all while navigating the complicated dynamics of a shared household where everyone is vying for Nanaie's attention.