Fuufu Koukan: Modorenai Yoru (Wife Swap: Irreversible Night) is a popular adult anime and manga series that has garnered significant attention for its intense psychological drama and taboo themes. While the official series explores the consequences of spouse swapping, the franchise has developed a massive secondary life within the world of (self-published fan works).

The art in Fuufu Koukan: Modorenai Yoru is tailored to enhance its tense, intimate atmosphere.