When Good Girl's fall for Bad Girl's

This takes place in Transylvania at Bloodwork high school. Its a school for vampire's .The good girl is Hikari which means Light or shining in Japanese. She just moved there and had no friends at her other school. She wanted to change that so she had some at this school. The bad girl is Ankoku which means Dark in Japanese . When they meet they hit it off as soon as they talked but as time passes they end up falling for each other. But as the time goes on Hikari finds out something about herself that she never knew. That her family hid from her forever but now that they are in Transylvania things are coming to light.........

Have to read to find out what the big family secret is.......