Fire Force (Manga) Vol 15
INTO THE SHADOWS
After their shocking discovery at the Oasis, Company 8 is forced to keep quiet while the top brass decide what to do with the information they obtained. Meanwhile, tired of all the secrets, the mysterious Joker teams up with Company 7's Captain Benimaru to fight a common foe: the leaders of the Holy Sol Temple!
Kodansha Comics(W/A/Ca) Atsushi Ohkubo