A record of two couples with pasts who applied for a swapping service offered by a certain company. The Furmoto couple, who have sexual preferences that contrast with their calm atmosphere, and the Ueda couple, who are mutually curious. After being judged as highly compatible by the CPU, they indulge in unusual pleasures far removed from their daily lives… Different skin textures from one's own wife, caresses filled with heat different from one's husband, the lewd acts of strangers unfolding before one's eyes. Excitement that is terrifyingly intense courses through the entire body, and multiple orgasms are etched in. Having experienced pleasure beyond marital relations, they hesitate not to open up new horizons…
