Koji is a new employee working at a trading company in Tokyo. He has just moved into company housing, but his stress is reaching its limit as his boss, Hojo, who lives on the floor above, starts to interfere in his private life. Meanwhile, he meets a mysterious beauty, Maki, in the apartment... Koji is Kokoro at first sight, but all he can do is greet her. But Maki's true identity is actually Hojo's wife! Since then, Koji tries to keep his distance, but one day, while hanging out the laundry, women's underwear falls from above...