20 years before the events of the original story, another girl discovers that she’s been kidnapped by a demon that plans to be her groom.

On her 16th birthday, Asagiri Kanna, a shy and bullied girl is abducted and taken to attend a new school. There she finds out she has been promised to marry the demon king, Kaki Kitou. Neither of them seem to be happy about it.

兽拳，乃是感受野兽之心，发挥出野兽力量的拳法，诞生于古代中国，拥有四千年的历史。兽拳可区分成两个派门，一个是正义的激兽拳，一个是邪恶的临兽拳。为了阻止临兽拳重现人间后支配世界，激兽拳在运动用品会社SCRTC支持下，组成激气连者和临兽拳对抗。