The Boy and the Beast

Nine-year-old Ren has recently lost his mother. With no news of his father and refusing to live with his legal guardians, Ren flees into the streets of Shibuya. Ren steals some food and sleeps in an alley, reminiscing the aftermath of his mother's funeral.

In the Beast Kingdom, the grandmaster has decided he will retire in order to reincarnate as a deity and names two potential successors: the popular Iōzen, who is also the father of two children, and the powerful Kumatetsu, who is lonely and lazy. The Grandmaster suggests that Kumatetsu find a disciple in hopes of inspiring him to succeed him.