Kana and Masato have been married for four years. They begin to see parts of each other that they couldn't see before, and their quarrels over trivial things only increase. At that time, I was invited to the house of Tsubasa, my girlfriend's classmate from school, whom I met again at her class reunion. During Tsubasa's student days, Tsubasa was plain, but now she has become so beautiful that it is almost impossible to recognize her... Masato thinks that the whole couple is soon invited to Tsubasa's house, and Masato learns that the secret to Tsubasa and his wife's marital harmony is a husband and wife swap. listen…
