Megumi lives modestly in a housing complex with her husband, a doctor. One day, feeling frustrated as their sexual activity became less frequent, she witnesses her husband cheating on her. The other woman is a married woman who lives in the same housing complex. Yes, her husband is having an affair with another married woman. Feeling distrustful, lonely and regretful towards her husband, Megumi consults with the other man's husband, Yoshida, but Yoshida is shocked and Kokoro that his wife has been seduced. With their life partners both seduced, the two begin an affair, seeking each other out with unfulfilled hearts...