VS. Special Fire Force Company 1 arc

The arc is the third story arc of the Fire Brigade of Flames manga series.

Summary
While at the 1st Special Fire Fighting Cathedral, Leonardo Burns, the Battalion Commander of the 1st Brigade, approaches and converses about the 8th and 5th brigades with Karim Fulham, Rekka Hoshimiya and Foien Li.

Some time later on, Shinra and Akitaru are seen trailing after Masao, and finally put and end to the Flame Humans life. A bystander calls out to the 8th brigade, calling them murderers and to bring back Masao, but they finish their task and go back to the Matchbox. Akitaru, Shinra and Arthur discuss the event, saying that even though the Flame Human was due to die anyway, people don't accept the loss of a person who is important to them. Back at the 8th Special Fire Fighting Church, Akitaru is annoyed to find that his locker has graffiti all over, with a note on it signed by Shinra. Bursting through the door, Akitaru calls out Shinra, but he denies doing anything. Hibana interrupts, saying that she made Shinra food and to leave him alone. Taking a second to think about it, he questions Hibana on her presence at the 8th. Hibana made lunch for Shinra, commenting that it tastes nice. Ultimately, Akitaru becomes stressed at the fact that nobody is focusing on the investigation of the 1st Special Fire Brigade except himself. Hibana then uses her Ignition Ability to create pretty flowers, infatuating Maki and Iris. Akitaru tells Takehisa that they're playing fire, but Takehisa doesn't retaliate and says he's finished with people playing with fire, irritating Akitaru further.

The girls decide to take a shower, and since the woman's bathroom doesn't work, Hibana offers to take them to the 5th instead of using the men's bathroom, which Akitaru jokingly states that she's trying to hire members to her brigade. As they shower, Iris asks about Hibana's goals at the 8th, which she says she will help the 8th's investigation on the 1st brigade. As they gather back with the others, Shinra picks up on the fact that the three get along really well, which Hibana states they bonded over being naked together, causing Shinra to pose a vigorous grin and bleeding nose. Arthur jokingly insults Shinra for putting on a face of a pervert when he's supposed to be a hero, causing the two to scuffle playfully. All of their blabbering leads to Takehisa to shout furiously at them for causing stress on Akitaru. Akitaru then stands from his seat, exclaiming he has came up with an idea, and then screams both Arthur and Shinra to get out of the 8th brigade.

Later, Akitaru explains to the duo that they'll be leaving the 8th to infiltrate the 1st Special Fire Brigade, pretending to be there for rookie training, but secretly investigating them.