[MKON-102] My beloved girlfriend was brainwashed by the leader of a cult and was reduced to a vaginal cum shot toilet for the followers. Kana Yura (Censored)

I went to the home of my first girlfriend, Kana-chan. There was a big photo of a cult leader hanging in the living room, and I was told that everyone in the family except Kana-chan was a fanatic believer. Naturally, that didn't change the love I felt for Kana-chan. Just as the two of us were starting to get along, Kana-chan's brother came home. "We're going to perform the important Ring Ritual now, so I'm sorry, but could you please go home for today?" I don't want to disturb my family's faith, so I'll go home for now. But what is this 'Ring Ritual'? I have a bad feeling about it...