Naoki, a mutual friend of the Yuina couple, has divorced.The two visited Naoteru's house to encourage their heartbroken friend. When the three of us were having fun drinking, the husband of Yuina, who has a weak drink, fell asleep.Actually... Naoki and Yuuna were former lovers in college. While drinking together, they reverted to the old two people, and Yuina, who is weak against pushing, was swept away by Naoki and crossed the boundary that should not be crossed.Her husband, who learned about her relationship, can no longer control himself and faces a shocking end.