A man calls a call girl to his house for the first time in a while. He feels like he's seen her somewhere before, but he can't quite remember where. He thinks, "She looks like my brother's fiancee," but doesn't believe it, so he asks her to send him a photo of her... and it turns out that this call girl is his brother's fiancee, and they're planning to get married next month. The devilish and perverted younger brother threatens her for this, and plays with the call girl who will become his future sister-in-law like a toy, enjoying plenty of insemination sex.