My girlfriend and I, Shiori, graduated from university and entered the workforce, and each of us got jobs at different companies. As they get busy with work and spend less time together, Shiori discovers an erotic selfie video that Shiori seems to have sent to another man. In addition to selfies, there are videos of her giving blowjobs to strange men, and of herself squirting as she is finger fucked in public toilets...When I pointed out that she was having an affair, Shiori obediently admitted it, so we planned a trip to a hot spring to make up. She apologizes and thinks they're making love, but her sexual desire explodes and they start having intense sex...!