Mitsugu Bamba, who loves to donate blood, encounters vampire girl Maid Vlad Transylvania.

Mitsugu discovers that different types of blood affect Mai's personality. Mai ends up drunk and goes on a night-time romp.

Maki invites Mai for a garlic dinner and Kaoru invites Mai for a costume party, and she ends up causing trouble at both venues.

Everyone is now suspicious of Mai and want to know more about her. Mitsugu attempts to hide Mai, but a bottle of dragon blood turns Mai into a rampaging monster.

The Blood Donation Club puts on a stage play.

The Blood Donation Club makes a film.

The nurse hangs on to a special bottle of blood from her youth. Everyone wants to know the history of that bottle.

Mitsugu travels around a wonderland looking for blood and meets the Blood Donation Club in various new roles.

The Blood Donation club meets Mai's fiancée, the undead monster Franken Yasohachi.

The Blood Donation Club heads to a isolated island for a summer holiday. However, a fish monster is on the island and Nami goes missing.

Mai agrees to an interview about her history.