As Kenta helps Karin study for her school exam, the two start becoming closer. But when Maki catches sight of them and asks if they are going out, Karin protests! She needs time, especially when she feels like she's starting to overcome her blood issues around Kenta. But a new problem is about to surface...and the odor is enough to make a vampire run to daylight!
Karin Maaka is a vampire with an unusual condition: instead of taking blood from humans, she must give them her blood instead! If Karin doesn't "donate" her blood often, she'll experience seriously intense nosebleeds. Her secret stays buried until Kenta Usui transfers to her class. Now her body produces more blood than ever before, and it looks like a reaction to him! Even worse, he soon discovers her true nature...