Setsuna Graffiti

High-schooler Kou has left his grandparents in Tokyo to return to Yamami, where he lived as a child. An incident he experienced in his youth has left Kou with a crippling fear of fire, until he meets a "Sorcerer's Apprentice" who changes his life.

A coming-of-age story revolving around boys who dream of becoming pyrotechnicians brought to you by Kino Hinoki of "No.6"!

Source: My Anime List