Chiho, who has experienced her husband's infidelity, admits she also has a "friend." Tired of the monotony in her marriage, she joins a trip seeking new excitement. However, she feels uneasy about going out in public with a remote-controlled vibrator inserted, and each time the switch is turned on, she protests with an annoyed "Stop it." Despite her initial resistance, Chiho gradually opens up, revealing the hidden, sensual side buried deep within her.