Why are you alive then?

I was summoned by my father. No, wait. When I call him "father," he glares at me with eyes full of hatred and says, "You have no right to call me father—you who took her life. It's abominable." So should I call him "Your Marquess" instead? "...Your engagement has been decided. I cannot possibly allow you, who took her life, to find happiness. But it is for the sake of the house. I cannot forgive you for being happy, much as I despise you, but marry and produce an heir." Along with his blunt words, the betrothal agreement was thrown at me. "I must respectfully decline the engagement. Or rather, I cannot accept it. I am a sinful existence, born from taking my mother's life. I intend to enter the church and offer my prayers. I have no intention of inheriting this house, so please take in an adopted child and have them inherit instead." "You—do you even understand what you're saying!? I am offering to let you, sinful as you are, inherit this house!? Be grateful!!" "No, I am fully aware of my own sinfulness. It would be unforgivable for someone like me to inherit the house. After all, isn't it what Your Marquess always says? 'Be grateful that I even let you live, you sinner.' Therefore, as a sinner, I shall go to the church to atone for my sins and pray for my mother's eternal peace." A heavy, dark story of this nature. The setting is loose. Some might find it stomach-turning. Published on Alphapolis and Kakuyomu.