forgotten the name of the manga with the plot of something similar to this. A boy saw a guy beating up a group of people then wanted to become strong like that so he asked him, and the man gave him task to do like running, the guy didn't actually know he would do it so he kept giving him new task and he did, after that the guy taough him stuff like lightning, after that the guy died and the boy was in

Thanks in advance 😀

It's called Veritas.

http://www.mangaupdates.com/series.html?id=16971

Jesus Christ, look at that guy's eyebrows.

"Hip-hop was set out in the dark. They used to do it out in the park"