Yuki Horikoshi is a fearful high school student. he gets picked on to an extreme by his classmates so much that he sometimes he wishes he never existed! he absolutely loves bats. one day while walking home from school after getting into a fight with his class mate bullies. he encounters a hurt bat laying on the ground barely alive. Yuki being who he is brings the bat home with him to his house, soon later to find out the bat he rescued is not as it seems. it happens to be a vampire. who offers Yuki a deal, his protection. but deals always have a price. in his case his body and blood.