Fire Force 16

Now that Company 8 has learned that Haijima Industries is using children in an attempt to spark an Adolla Burst, Shinra is eager to put a stop to their heinous practices. To infiltrate their facilities, he agrees to let them study his own powers, and now he must face one of the ghosts of his childhood–the evil Kurono, a twisted pyrokinetic with enough power to rival the toughest soldier on the Fire Force.

Volume 16 of the Fire Force manga series by Atsushi Ohkubo.