Be mine~Kanato Sakamaki Love story~Diabolik Lovers

Kanato finds himself in a timeline where the Sakamaki's aren't real and he has the choice of being with a spoiled bratty vampire princess or a elemental demon princess who is the vampire's mentor. To be with one or the other could mean he could be stuck in that time for good or not. Can he chose correct or will he chose his own death?