A race of cannibal monsters called the Shokujinki exists and it is the job of the Kifuuken, an elite group of beast-hunters, to stop them. Toshihiko Momota, an expert swordsman and son of the Kifuuken organization's leader, unexpectedly falls in love at first sight with a beautiful girl named Yuka. However, the couple's relationship is much more complicated than it seems at first glance, for Yuka is a Shokujinki.
Yuka celebrates her birthday with Toshihiko, but when she tried one of his secret immobilization techniques on him, he ends up paralyzed, just when their gigantic pursuer finds them.
The story of Toshiko's father is finally revealed, as how he became the leader of the Kifūken and his relationship with Yuka's mother.
Kyūtarō exposes his plan to reformulate the Kifūken's organization with the help of Kazuma. Trouble arises when another member of the school gets himself involved with a Shokujinki.
Toshihiko escaped with Yuka and they hide themselves in a far away mansion.
While Toshihiko tries to convince Rie's father to join his battle against Ōba, Kazuma rushes to fight him by himself.
Toshihiko's life changed drastically when his father dies, and Yuka's true nature is revealed to him.
Ōba transforms Rie in a Shokujinki and put her into a fight against Yuka. Meanwhile, Kazuma discovers the truth about his origin.
Toshihiko and his allies struggle to stop Ōba's ambitions.
Toshihiko is captured and tortured by a group of Shokujinki commanded by Yuka's former lover. But soon the Kifūken discovers their location and storm the place.
Toshihiko dedicated his life to only one purpose, to hunt down and destroy the Shokujinki, until the day he met Yuka.
Rie discovers Toshihiko's hideout and goes all out trying to bring him back home. Meanwhile, Yuka has a surprising revelation.
As Kyūtarō Ōba put his master plan in motion, he finally reveals his true colors.
Once again on the run, Toshihiko and Yuka take a hike with a kind old couple. While traveling with them, they try to sort out their feelings for each other.