One day, Yuki's friend introduces her to her new boyfriend. He was the type of guy who didn't seem right for the girl he was with, but as long as her friend was happy, Yuki decided she'd give him her blessing. Then one day she goes out for drinks, blacks out, and wakes up in a man's apartment. She was undressed, and a man was groping her. It was her friend's boyfriend! And compared to Yuki's own man, his cock was unbelievable. She didn't want to betray her boyfriend, but... that dick, though....