Kanojo o Torareta Ano Natsu no Hi

On an anniversary trip with her boyfriend, despite having high expectations for the night, her boyfriend got drunk early and passed out...

Annoyed at him for not waking up, she left the room and was approached by a man she passed by. He was the same man who had hit on her earlier that day.

Seemingly by coincidence, he was staying at the same hotel, and he started flirting with her again. Perhaps because she had some frustrations with her boyfriend, she ended up responding to the man's advances.

She thought she could just stop if she didn't like it... But that thought was short-lived as she experienced an overwhelming difference from what she'd known with her boyfriend, and she found herself sinking deeper and deeper into the man's trap.