In a society where humans share their world with Juujin, animal-like beings with human characteristics, a new breed emerges known as Evolutions, or EVOs, possessing extraordinary powers that threaten mankind. Peke, an EVO raised by her master Yamato Yamamoto, faces a crucial mission. Yamato's mother, a member of the Health Care Center overseeing Juujin, invents a special collar to restrain EVO abilities. When unleashed, Peke must harness her powers to combat rogue EVOs, aiming to safeguard humanity and earn her master's affection. Volume 1 includes an additional chapter titled 'Bangaihen: Umi to Neko,' delving deeper into Peke's world.