Well, there are some deaths that come as surprises and are crucial to the plot's development. But I suggest you explore the manga to experience the full impact.
Denji is one of the main characters. He is the Chainsaw Man, a young man with a rather rough life who gets the power to transform into a chainsaw - like devil - hunter.
Chainsaw Man follows Denji as he navigates a dangerous world where devils exist. His life changes when he becomes part-devil and has to deal with powerful foes. The story has exciting fights and explores themes like friendship and survival.
There is a Chainsaw Man light novel. It offers new perspectives and adventures within the Chainsaw Man universe. It's worth checking out if you're a fan of the series.