A married woman who can't forget the sex she is forced to hold and is fascinated by the swamp of cheating

Serino lives happily with her husband. However, there was one problem. That was Sakamoto, who lives in the same apartment building. She looks soaked as if licking her, like a peek at the naked body under her clothes... One day, Serino, who had hoped it would be okay if she was misunderstood, suddenly gets hit by a nightmare.