Rin, who is tired of the coldness of the city after losing her job and being kicked out of her boyfriend's apartment, finds a live-in job as a dormitory mother.The people living in her dormitory are Koshinzuka, who keeps failing exams, Takinogawa, who is a shut-in, and Arakawa, who is unemployed and is in the middle of a divorce.In such a situation, Rin, who is struggling alone, is asked by his ex-boyfriend (actually, he has a girlfriend)...While enduring her lonely feelings and making her huge breasts bounce, Rin heals the dormitory brightly today!