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Momoko wakes up feeling refreshed... but she doesn't know the room!? Momoko panics when a shirtless young man appears, but it seems that he got drunk last night, got into a fight with his neighbor Kengo, and then showed up at his house. Momoko regrets that she has no memory of what happened, and Kengo shows her a video he took yesterday as evidence. It seems that the two of them had become an adult couple overnight...?!