Chainsaw Man, Vol. 15 by Tatsuki Fujimoto

[Viz] 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! As a primal fear devil makes its appearance, the world may soon be turned upside down. This devil has the power to drive a wedge between Asa and Yoru—can the two of them manage to work together to avoid becoming a meal for the residents of hell?