After Three Years of Sign-Ins, I Became the Rich Family’s Son-in-Law

I get bound to a sign-in System that gives me rewards every day, on the condition that I become a live-in son-in-law. On day one, my mother-in-law calls me useless. On day ten, my father-in-law begs me to treat his illness. On day one hundred, my wife invites me to bed. On day 365, the entire wealthy family kneels and calls me Dad. Three years later, the System asks me, “Host, do you still want to sign in?” I say, “Yes. I’ll sign in for the rest of my life.”