What Should I Do If My Sister Becomes More and More Clingy to Me?

[Redemption] [Tear Jerker] [Japanese Light Novel] [Sister Series] When I was four years old, looking at my newly born sister, my mother told me that I would be her brother from now on. Somehow, my crying sister started laughing after holding my hand. Only then did I feel something substantial. Ten years later, many changes occurred in the family. Due to my sister's congenital emotional defect, she could not live without people around her. The only person my sister could rely on was me. Being scorned by the world and looked on coldly by relatives and friends, the fact that my sister is becoming more and more attached to me will not change. Because we only have each other. A bittersweet memory, a sad and happy comedy.