Shamo

At the age of sixteen Ryo Narushima was a genius and looked to have no trouble of getting into Tokyo University and joining the elite of society. However, that summer something cracked inside Ryo's head. With a small knife he brutally murdered both of his parents only leaving his sister alive and cowering in a corner. It is at this grotesque incident that our story begins.

Note: The series has been completely written & drawn by Tanaka Akio from ch.61 in Vol.26, which was the first chapter after a long hiatus, and the original author Hashimoto Izou wrote less and less starting from Vol. 4.
The series changed publishers, which lead to a restart of the chapter numbers, with Vol.20.