My husband doesn't know - my lewd desires and secrets

The Miura family ends up calling a plumber due to a leak in the bathroom. The person who came was Hirai, a junior to her husband, Kotaro. At that time, Hirai, who had a crush on Eriko, met for the first time, couldn't help but express his affection as soon as they met. A few days later, Hirai visits her husband for repairs while he is away. In the awkward atmosphere, Hirai can't hold back and pushes Eriko down. Despite being forced to rape, Eriko's body felt pleasure, and felt aroused by the afterglow...