Usami and his wife run a coffee shop. The husband, Jin, ran the business while his young college student wife, Koi, supported him. The lovebirds had a good reputation and the restaurant was thriving. They met a few years ago when Jin saved a Koi that was suffering from ○○○○. This led to a relationship and marriage, and they lived happily ever after. However, the ________ again reaches out its evil hand to his beloved wife's Koi. In the public space of the train, Koi was at the mercy of XX.

Aoya Nanamori, the culprit of XX, makes contact with Jin, who rides with him on the train and secretly watches over him, vowing to take down the culprit. However, Nanamori told Jin a shocking truth: She felt it. Jin is filled with doubt and shock, wondering if Koi really felt it. He would then secretly follow her to see if his words were true and to confirm the site of his beloved wife's vaginal discharge. Without realizing anything about the warped desires that are beginning to awaken in the depths of their hearts.

And then, Jin was again exposed to ○○○○ Koi, and he watched her lasciviousness.

"Cute ......"

Jin forgets his husband's position and gets excited at the sight of his wife being made to feel at the hands of a man other than himself. Such evil excitement was to destroy the love of Koi of the lovebirds...