After a breach between Earth and the netherworld opens up over New York, humans and creatures from other dimensions become trapped in an impenetrable bubble that surrounds the city. Forced to coexist in a new city known as Salem’s Lot, the shaky peace between humanity and the netherworld creatures is protected by an underground group of super humans known as Libra.
When a case of mistaken identity brings not-so-ordinary delivery boy Leonardo Watch face-to-face with this group, he joins their ranks hoping to help prevent the destruction of the world by a group of monsters and madmen lead by a powerful being known as the King of Despair.
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A normal boy associated with the secret association, Libra. He has the "All Seeing Eyes of God" with the exchange of his sister's, Michella, eyesight.
Libra's Leader. He has a strong and stern aura around him due to his big build, but his demeanor is actually calm and gentlemanly. He is a master of the Brain Grid blood battle style.
A silver-haired and brown-skinned hot blooded man. He is good at taking care of the junior he is paired with. He is a master of the Big Dipper blood fighting style's Kagutsuchi branch.
An invisible werewolf. She has the power to decrease her presence. Her main job is to collect information, spy on enemies, and chasing down people.
A man in suits with an eye injury. He is the second in-command after Klaus. Being able to freeze everything with a kick, he is a master of the Esmerelda Blood Freeze.
A tall lady. She is excellent in her fighting abilities. Her Blood Battle Arts come from guns that creates electric shocks, putting down enemies and monsters with it.
A combat butler. An old man with darker skin, white hair and a mustache. His whole body is wrapped with the exception of his face.
A monkey that is capable of running at immense speed.
"Hello, world!" by BUMP OF CHICKEN
"Sugar Song to Bitter Step" by Unison Square Garden
Osaka Ryota as Leonardo Watch; Koyama Rikiya as Klaus V Reinherz; Nakai Kazuya as Zapp Renfro; Kobayashi Yu as Chain Sumeragi; Miyamoto Mitsuru as Steven A Starphase; Orikasa Ai as K.K; Uchida Yuma as Sonic Speed Monkey