Its about a boy/man who is lived a sad life(i guess), he has no emotions until one day he meets a man who's dad owns a boxing gym. He lets the emotionless man live with him but he has to box. With boxing and sex the emotionless man slowly gains emotion and the feeling of love with the son of the man who owns the boxing gym. (the dad does not know he's gay). Sorry Im terrible at recalling what happened.
I can’t remember much, but there was a girl who woke up a vampire and she might have had pink hair. And he was trying to go everywhere with her. I think the vampire had a sister as well.
Have you tried Unholy Blood??