My beloved wife was having sex with a colleague right in front of me, and for some reason my dick got rock hard. Kana Morisawa - Kana Morisawa (Kanako Iioka)

The movie revolves around Kana Morisawa, a married woman, and her complex relationships with her husband and her colleague, Mr. Hashimoto. The title suggests a situation where Kana's husband is aware of her infidelity with Mr. Hashimoto, which leads to a exploration of themes such as marriage, desire, and boundaries. As the story unfolds, it delves into the emotional struggles and power dynamics within these relationships.