One of the best I've read in a while. Although, it is kinda dramatic and very painful to read some parts, so if you're the type that dislikes things going awry I don't recommend reading it. For me though, It's one of the best regarding plot and delivery of it. Mc, the obstacles Mc has to face are very sincere and phylosophical, I found a lot of things to think about after some chapters.
SSS-Class Suicide Hunter