**disclaimer I am not finished with this, but I am a fan of Boichi's work**

So far, I have genuinely enjoyed this piece and will update as I continue. After reading a lot of manga with gangster themes I find this one a bit refreshing. It's not 100% serious, but it does remind you of what the entire purpose of Ken's journey is. His focus isn't really the gang or the mafia it's maintaining good graces with Yumi(n). All these other escapades are just really well written character development plots that happen in between.

Do not let that sway you from reading this though! Sun Ken Rock is VERY much a mature seinen that I 100% recommend anyone to read.