Kito the Night Bell

"Sorcerer"... an accursed name given to the most feared heretics known to the world. Roan, one such sorcerer, lives a life worse than slavery, one forced upon him by a circus troupe. Things only change when he runs into Kito, a fellow sorcerer and a member of the Nightbells, a notorious vigilante group. It won't be much longer before these most hated of people are the very ones tasked with saving the world...

(Source: K Manga)