A couple, Yuka and Gou, had a good relationship. One day, Gou's NTR attribute was found out by Yuka, and since then, Yuka started avoiding him. However, later on, Gou was celebrated for his birthday by Yuka. It turned out that Yuka wasn't avoiding Gou but was planning a surprise for his birthday. Gou was relieved. Yuka said, 'He'll surely be happy...' and showed Gou a video. It was a real cuckold video of her having sex with an unknown man and climaxing.
