I find it easier to read the comic version because it's hard for me to imagine the scenes unless they're well described. I don't know. It's in English right? Or has an English version?
It is in english but well if you have problems with it then the comic is just fine I guess (?) xD Ressee, Haru and Kai are the "containers" of the rowdyruff boys, that is explained in chapter 3 or well... it starts being explained on that chapter XD