My Cold and Yandere Sister

An accident caused the death of the male protagonist's parents in a factory in the mountains. The male protagonist began to become silent and depressed. A woman who claimed to adopt him broke everything. Let the male protagonist leave the mountains and go to the city. What will happen to the male protagonist in the city and the woman who claims to be here to adopt her? Please take care of me as a new author. Tell me what you write poorly, and I will try my best to correct it. Say it in advance. If I write poorly, please don't scold me. Thank you. And the male protagonist has a system to help him in the back. Well, that's about it. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.