Kokoro is the mistress of a married man. She was working at a convenience store. Yu was Kokoro's colleague, he had also noticed her for a long time but still didn't dare to confess. Today, Kokoro went to the store to buy things, and among them were condoms! Knowing that Kokoro is currently with another man disappoints Yu. But the next day, Kokoro took the initiative to invite him out for a drink. Since he missed the last train, he still wanted to drink, so Kokoro thought about going back to Yu's house to continue. As soon as he arrived at the door, Kokoro immediately hugged Yu and gave him a hot kiss. Unable to resist, Yu had been fucking Kokoro round after round all that night. Yu mustered up the courage to confess to Kokoro, but she refused. Kokoro promised to let him fuck him whenever he wanted, but she couldn't return his affection...