Natsuki Takeuchi discovered that her best friend had a cheating husband, and she got involved to scold him. He made the most ridiculous excuses, claiming it wasn’t his fault and that he had a cock too beautiful for ladies to resist. Natsuki didn’t want to hear any of it, but after witnessing that rooster with her own eyes, she too became a believer (and a cheat on her own girlfriend). Classic Natsuki.