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Kaine: Endorphins, Between Life and Death is a shōjo manga written and illustrated by Kaori Yuki. It consists of four short stories: the titular story revolves around a boy who assumes the role of his deceased, rockstar twin, while "Magical Mystery Tour" focuses on a girl who wins a trip to Los Angeles and finds herself entangled in a plot to steal an inheritance. "Orange Time Bomb" deals with the interpersonal struggles of the members of the band Orange Bombs, and its sequel, "Tokyo Top," focuses on the band's singer pursuing an acting career and the love triangle that ensues among the actors.