When Lima Morta, a graduating student of Sanctum, finds out that his insane guardian is the new first-year combat instructor for Haven, he quickly crafts an exit plan. With his bow in hand, and a quiver full of gravity-dust filled spikes, he sets off for Vale—Destination; Beacon.

Hisoka Higawara struggles to understand those around him, but he's learning quickly. One day he makes friends with a girl named Nanami, and his life will never be the same.