愛する妻・泉希（いつき）が資格取得のため大学へ再入することに。まだ若々しく綺麗な妻だから不安が収まらないボク。ゼミの飲み会での写真には、何やらイケメンと楽しそうにする姿。でもチャラ男より誠実な男がタイプだということは、ボクが一番知っている。心配することなんてない…人妻だし、軽々しく手を出すやつなんていないハズ。その思いを裏切るように、日に日に遅くなる妻の帰宅、イヤだ…信じたくない！講義もサボって年下男に何度も中出しされまくっている妻なんて…ありえない。

My beloved wife, Itsuki, has decided to re-enroll in university to obtain a qualification. She's still young and beautiful, so I can't help but feel anxious. In a photo from a seminar drinking party, she looks like she's having fun with a handsome guy. But I know better than anyone that she prefers sincere men to playboys. There's nothing to worry about…she's a married woman, so surely no one would try to make a move on her. But contrary to my hopes, my wife is coming home later and later each day. I don't like it…I don't want to believe it! My wife skipping lectures and getting fucked repeatedly by younger men…it's impossible.