Review Detail of Redknightsun in My Vampire System

It's interesting. The story revolves around the MC and his system, where he could get XP from defeating opponents and got bunch of useful skills. Imma say, I got interested in the earlier part where he got bonus stats depending on what ABO and RH blood type he defeated. Also, the character development is progressing on unexpected turns. The MC befriended a guy, whose I suspect has Multiple Identity Disorder? (dunno if it's a trauma or something that is related to his ability) and a vampire-fanatic girl. What a weird combo,huh. Anyways, I'm hoping it will continue as it is as I am in just less than a hundred chapters or so.