In town, blood-sucking incidents are growing frequent. As Kitaro investigates, he receives a letter. The sender wants to be killed. Kitaro goes to visit the sender and meets Onozaki, a genetics researcher. Onozaki has created immortal cells and conducted an experiment where he injected himself with them. As a result, he has obtained an immortal body and also turned into a youkai. When he transformed into a youkai, he lost control and went seeking blood. All the recent blood-sucking incidents were Onozaki's doing. Because of the immortal cells, Onozaki can't kill himself, so he begs Kitaro to kill him, but...
I become a monster that
only wants to feed on blood!
أصبح وحشًا لا يرغب 
!إلّا بالتغذي على الدماء
Ich werde zu einem Monster
auf der Suche nach Blut.
Me vuelvo un mero monstruo 
sediento de sangre.
Me vuelvo un mero monstruo
sediento de sangre.
Divento semplicemente un mostro che desidera sangue.
Eu me tornei um monstro que
só quer se alimentar de sangue.