Absolute Duo manga volume 1 features story by Takumi Hiiragiboshi and art by Shinichirou Nariie.

Blazing Shield

At Koryo Academy, students battle with weapons forged from their souls. Kokonoe Tor, however, is an Irregular. He doesn't have a weapon - he has a shield! To gain the strength he seeks - and thus unravel the truth of his tragic past - he must form a Duo with another student. But first, he has to figure out how to share a room with a girl, the graceful fighter Julie Sigtuna, and not die of total awkwardness.