Back to the Future: I Don't Like Killing People

Heavy rain—— It's like a fair execution... Silence... Killing everyone fairly... Everyone is dying for it... Relief, rather than die, it's better to have a big fight with me! Are you guys ready to go crazy! Hahaha! [Time Travel] [There is a system] [I am currently not sure whether the male protagonist is the only handsome one or there is a female protagonist] Just be at ease... I am a novice author. If you have any areas that need improvement, you can put forward them. I will think about them and adopt them one by one if appropriate. Come on! The first few pictures are a bit nonsense. They were used to set up the protagonist. If you don't want to read it, you can jump directly to Chapter 7, but it may be a bit unclear╯▂╰