Kenji and Kana met at a club in college, and both decided to get married. Kenji also had two close friends from the same school, Yuta and Takashi, two close friends who helped him a lot. On every wedding anniversary, Kenji asked Yuta for advice on buying a gift for his wife. And his happy life went on like that. There were times when work was not going well, he got angry with Kana and she had to leave. But after all, the two still got back together. In the ninth year, Kenji was sent on a business trip by the company, he didn't want to go but his wife convinced him not to miss this opportunity. Agreeing with his wife's advice, Kenji went away and lived alone in a far away place for a year. On their tenth wedding anniversary, Kenji decided not to ask anyone else, he would prepare everything himself and propose to Kana again, thanking her for always being there, loving and encouraging him. Kenji also lied that he couldn't come back to surprise Kana. Almost home, he was excited and nervous to see his beloved wife again. Opening the door, Kenji suddenly saw two pairs of men's shoes in front of the door. When he went inside, he heard a very familiar male voice. Opening the living room door, he was shocked, regretful, and empty when he saw his wife naked and laughing in the arms of her two best friends.