@Skyrin
It's old school old 80s early 90s delinquent manga. Think Shonan Junai Gumi more than Out. Comedy and drama in spades, even good romance. It can be an amazing tear jerker one story arc, and slapstick hilarious the next. The first 2 volumes can be considered off putting because it's done by an 18 year old drawing his first manga straight out of high school and it shows, both in content and art. It finds its footing starting around volume 3, which is where I picked up translations. That's not a bad place to start reading the series either, if volume 1 doesn't do it for you. I recommend reading volume 4 to try it out, because that has a good mix of everything that I think makes it great. You can always go back to the earlier stuff if you like it.
Someone better make sure Kai gets the most brutal beating of all time and all of his teeth are knocked the fuck out. Oh and break all his limbs at that. Annoying POS