MKON-118 Karin Kitaoka: She was brainwashed and seduced by the leader of a cult she hated.

I went to the home of my first girlfriend, Karin-chan. There was a large photo of a cult leader hanging in the living room, and I was told that everyone in the family except for Karin-chan was a fanatical believer. Naturally, that didn't change the love I felt for Karin-chan. Just as the two of us were starting to get along, Karin-chan's father came home. "We're going to perform the important ring ceremony now, so I'm sorry, but could you please go home for today?" I had no intention of interfering with my family's faith, so I decided to go home for the time being. I never imagined that something like that would happen after that...