My stepsister wants to force me, who is already engaged, to recreate a story. (Katou Minori, ADN-487)

I have a stepbrother. Or rather, a former stepbrother. After my mother remarried, I had a brother. He would help me when I was bullied. From then on, I liked him. I asked my mother, "Can my brother and I get married?", which confused her greatly… Later, my mother divorced again, and my brother separated from me… Whenever I feel lonely, I want to see him.