Heima, who was told by his company to work in Tokyo, moves into the company apartment where his aunt Kaori lives, but the previous resident Mitaka is still there and there is no room available. Kaori, who happens to be the manager on rotation, intervenes and promises that Mitaka will move out on the next payday. In the meantime, Kaori's husband is working away from home, so she lends the spare room to Heima. That night, Kaori gets drunk at the welcome party and starts groping herself while muttering in her sleep, "I'm lonely..." but...