Since the beginning of time, the Zaibatsu conglomerate has been engaging in brutal, murderous underground conflicts that have attracted significant financial investment.
An old friend asks Yuuya Nomoto to take him and his friends around to meet women. Yuuya was unaware that they intended to kidnap the girls through force. However, they picked the wrong victim, and all of them—aside from Yuuya—were murdered by Hitomi. She then compels him to visit a waste dump. Yuuya sees her here using her extraordinary talents to combat another human who has also transformed into a beast with the look of a lion. They are both therianthropes, meaning they possess both human and animal intelligence and skills. These creatures fight ferociously in conflicts known as Killing Bites.