Based on the erotic game by Lune TeamBitters.

Leaving her husband, Yuutou, for her job, teacher Marika is forced to have sex with her student, Yuuki. Her composure still all over the place, the next day she is called out to by the superintendent of the building, Torao. Using a picture of them kissing as blackmail, Torao has fun with Marika’s body for an entire day. Seeing that Marika took off work without notifying anyone, Yuuki worries about her and goes to her place, only to find the two of them fucking. Marika’s husband, Yuutou, starting to get suspicious of his wife, is invited by his peer only to find…