A few years into her marriage, Yuna struggles with her relationship with her husband and attends a class reunion after many years. There she reunites with her admired teacher, Ozawa… They exchange contact information and start frequently discussing her husband's problems. One day, Yuna sees her husband and his mistress walking happily together. She contacts Ozawa in a state of severe distress. Ozawa gently embraces the heartbroken Yuna, feeling guilty but still exchanging a kiss with her. Yuna responds by wrapping her legs around him, pressing their sweaty bodies tightly together…
