A pediatric surgeon who's more childish than the children and looks like a delinquent takes center stage! Appendicitis, phimosis, congenital esophageal atresia, traffic accidents... various illnesses and traumas that befall children. Sakurako Hoshino protects small lives with her magnificent surgeries!
Having been raised by his adoptive human parents, Charlie is now 15 years old and all set to embark on his high school journey. Upon starting high school, Charlie swiftly befriends Lucy, a scholarly loner. Nonetheless, Charlie's life takes a drastic turn when a cohort of animal-rights extremists, who had freed his biological mother from a research laboratory 15 years ago, returns as terrorists set on abducting Charlie at any expense.
King Dark Fleet is bored of ruling the Demon World and so he appoints a successor by the name of Yoshida. The demons are thrown into a rage when they realize that this Yoshida is a human boy. Cute demons begin to enter our world through a magic mirror, bent on killing Yoshida and taking the throne for themselves. Of course, the young boy has no idea of his new kingship and only has his limited magical powers to protect himself and his friend, Ageha.