Haruto Tokishima, a high school student, discovers Valvrave, a mysterious and very powerful machine, and after controlling it Haruto becomes immortal.

While working as a taxi driver on the hectic streets of Tokyo, a reticent walrus gets pulled into a mystery involving a missing teenage girl.

Yuugo Hachiken enrolled in Ooezo Agricultural High School for the reason that he could live in a dorm there. In some ways he chose Ooezo in an effort to escape the highly competitive prep schools he had attended previously, but he was faced with an entirely new set of difficulties at Oezo, surrounded by animals and Mother Nature. After growing up in an average family, he began to encounter clubs and training the likes of which he had never seen before.