Phantoms, ethereal beings that defy reality, lurk unnoticed among humans. Their origins are shrouded in mystery. A research facility blast releases a virus granting special powers to some, turning them into Phantom Hunters. Haruhiko Ichijou is one such Hunter, though not very skilled. He's knowledgeable but indecisive and lacks speed in sealing Phantoms. His teammate, Mai Kawakami, adds chaos to the team alongside him at Hosea Academy. To enhance their abilities, they recruit new teammates and discover hidden information about Phantoms and a mysterious bombing at Alayashiki Research Facility.
Clumsy Haruhiko and Mai, known for her violent tendencies, are on a mission t...