[Comprehensive] Please Don't Be My Younger Brother!

I guess this article is a Douluo and Doupo fanfic, and I'm not sure what will follow. The introduction is incompetent, in one sentence: The tragic story of an unlucky kid who played time travel and was thrown into different worlds by the system to live in dungeons. Let me explain first This article is the product of reading a bunch of fandoms. Your outlook on life may not be very upright, you may have a lot of cheating, and you may even be a bit suicidal. Please be careful!