Mortal Remains by Atlas Jones

Vale has hunted demons, monsters, and rogue mages for centuries as a Templar. So when rifts to the underworld tear through the city and the undead spill into the streets, he expects another power-hungry necromancer at the center of it all.

Instead, he finds August, a soft-hearted necromancer who uses his illegal magic to guide restless spirits to peace, even as it kills him from the inside. August is running on borrowed time, and he’s spent weeks tracking the real necromancer who is raising armies of the dead.
Vale’s touch shouldn’t heal him. Templars and necromancers are natural enemies. But when Vale’s hands meet August’s skin, the black veins of corruption fade and the pain stops. For the first time in years, August can breathe.
Now they’re partners in a hunt that neither of them can survive alone. But the closer they get to the truth, the more August needs his magic…and the more he needs Vale’s touch to survive.

Mortal Remains is a m/m enemies-to-lovers urban fantasy romance between a Templar and a necromancer. It features a touch starved necromancer, a morally grey Templar, forced proximity, hurt/comfort, and a happy ending.

Mortal Remains is book one of the Haven Chronicles series and does not need to be read in order.