Project ARMS Vol 3

From the VIZ Media edition

Egrigori has turned Hayato's village into a nanotechnology research lab used for human experimentation. But before Hayato, Ryo, and Takeshi can find out more, the ARMs kids have to survive a battle against The Crimson Triad, a high-tech superagent group known for their ruthlessness and fierce bloodlust.

Source: Anime News Network Encyclopedia