Nothing In This World

This story is about a boy ( Obanai ) who is deeply in love with a girl called Mitsuri but isn't able to tell her , though, because of his "filthy blood". It was believed that he thought he was a tainted individual who was unworthy of love caused by the trauma he had endured in the past. But after meeting her, she changed his perspective of things.
But it all suddenly all came to a downfall when they battled Muzan, as they both suffered major injuries from Muzan, both wondering what their fates are going to end before they slowly lose their conscious from the lost of blood hoping they would be reincarnated together.