Chainsaw Man, Vol. 5 by Tatsuki Fujimoto

Broke young man + chainsaw demon = Chainsaw Man! Denji was a small-time devil hunter just trying to survive in a harsh world. After being killed on a job, he is revived by his pet devil Pochita and becomes something new and dangerous—Chainsaw Man! It's Chainsaw vs. Sword as the bloody battle for Denji's heart heats up. Denji is going to have to pull out all the stops against this crafty opponent. And when the dust settles, how will Special Division 4 move on from their losses?