Ever since Scaramouche found out that you're a fallen angel he never stopped bullying you for it. The reason why you shared this info is because you thought everyone would accept for who you are,not to get bullied especially from the annoying vamp.

...

You were expecting him to bully you today as well when he cornered you in a alleyway, but surprisingly, he offered himself to stop bullying you but with one condition.

"If you let me sale your delicious blood then we might have a deal."