The Infected Wishes By V. S. Amitesh

The one thing Eshaan could never conquer in life was suddenly fed in abundance: Terror. But when he meets Rasri, a mysterious girl with impossible claims, everything changes. She pulls him into a horrifying world born out of her failed magic- a realm filled with nightmarish monsters and dangers beyond his darkest fears.
There's a thing in the world Rasri comes from: Good beings turn to evil souls. It's how a deadly infection rises, threatening to eradicate everyone. And to Eshaan’s utmost horror, Rasri, the one person he thought he can trust in this chaos, is connected to this terrifying transformation. Desperate for escape, Eshaan begins distancing himself from everyone, because as long as he
is safe, nothing else matters.
But his hope becomes a distant memory when circumstances force him to face his most debilitating fear.