Merc Storia takes places in a world where humans and monsters coexist. The protagonist, Yuu, is a healer apprentice and possesses the ability to tame monsters. In a quest to regain the memories of Merc, a girl confined in a bottle, the pair embarks on a journey.

Merc Storia: The Apathetic Boy and the Girl in a Bottle ran for 1 season. No new episodes are scheduled.