Hidden beneath the name "shared house" lies a bachelors' dorm filled with a voluptuous romantic atmosphere. When the female caretaker suddenly takes a leave of absence, the male residents—who were completely dependent on her cooking—are left in disarray. In her place arrives Rin, a voluptuous female college student with a big chest and curvy hips, radiating youthful innocence and charm. As Rin steps in to manage the dorm, the men find themselves irresistibly drawn to her presence. Sex, fantasy, titty fuck—healthy and alluring Rin completely captivates their hearts.