Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.
Mao, who has three heads and no dignity as a Demon King, has turned 20 years old and decided to take the opportunity to go into the world of humanity to practice the Demon King.
Together with the ometsuke Jin, Mao dives into the boarding high school for men and begins to study about the world of humanity and humans. However, he is clumsy, not good at exercise, and cannot keep up with the class.
Besides, there are angels in the next class and there are many difficulties in Mao's days of training.