Help Please(diabolik lovers) *Edited*

what if yui had brother (step brother) that decided to give his big sister a visit. yukio is a sadistic boy that loves to torture yui and others. Karl noticed this and has been giving this boy his prey. as he started to settle in with the brothers and yui. will something break his stone heart and make him happy other than seeing the blood of his prey spill.

I DON'T OWN ANY PHOTOS OR PICTURES IN THE BOOK!!!