Ajin

Those who are resistant to death are called Demihumans
That day Kei Nagai a High school student should have died in a traffic accident but he comes back to life shortly after In other words Kei is a demihuman Since then Keis world changes dramatically Terrified and without knowing what is going on Kei is saved by his friend Kai Together they flee deep into a deserted mountain Later a group of demihumans who are hostile against humans contact Kai Who is he fighting against Who should he side with