A young boy flees tragedy and mistreatment, ends up in Tokyo's Shibuya ward, and is helped by a rough-living bear, who gives him a new life and a new name.

Ichirohiko has suffered, caught in the space between human and beast, and has succumbed to the darkness. Kyuta leaves Kumatetsu, on the brink of death, in the care of the others and heads to the human world in pursuit of Ichirohiko. It's the start of a life and death battle in the streets of Shibuya to settle things not only with Ichirohiko, but with the darkness in his own heart... What can he do to save everyone? The time has come for Kumatetsu,...

When four-year-old Kun's new baby sister is named Mirai (meaning 'future'), and the baby quickly wins the hearts of Kun's entire family. As his mother returns to work, Kun becomes increasingly jealous of baby Mirai, until one day he storms off into the garden, where he encounters guests from the past and future, including his sister Mirai as a teenager. Together, Kun and teenage Mirai go on a journey through time, uncovering their family's incredible...