Hitomi, who has retired from teaching and is now working as a cram school instructor, is busy living alone and is looking for a housekeeper. One day, Yui, whose husband has been laid off and who has sold their house and is looking for work, sees an advertisement for a live-in housekeeper and comes to visit. Yui's visit quickly shatters Hitomi's sanity. Yui is the spitting image of a former student whom Hitomi secretly had feelings for during her time as a teacher and who she lost to. What a surprise...