Absolute Duo is a tV series anime that premiered in winter 2015, produced by 8-bit.

About the production: the story comes from a light novel, there are 12 episodes of about 24 minutes and its current status is "finished".

Its main genres are action, ecchi, romance and supernatural, with themes such as School, Female Harem, Swordplay and Boarding School.

On AniList, Absolute Duo has an average score of 60%, an average score, and appears on 123,086 users' lists.

The story begins with Blaze — a weapon that is the manifestation of a human's soul. Tooru Kokonoe happens to be qualified for this, but for some reason his Blaze is not a weapon, but a shield. Moreover, he enrolled in a school that teaches combat skills, and thanks to the school's Duo partner system, he ends up living with a beautiful silver-haired girl. (Source: Anime News Network)

Official synopsis from AniList.