To celebrate the successful completion of an important business deal, Ohno goes to his colleague Natsuki's house for a drink. He is envious of the rapport between Natsuki and his busty wife, Natsuki Reira. Just as the party is reaching its climax, Ohno and Natsuki get into an argument over something trivial. However, Natsuki gets drunk midway through the party, and Ohno, left alone, approaches Reira to relieve his frustration...