Back From The Death's Door

Back From The Death's Door summary:

[Translated by Lilith Scanlations] As the "Comet" virus swept across the earth, infecting most of humanity and turning them into zombies, the remaining survivors sought refuge in the underground city of Shire. Xiao Yan, a rookie researcher longing for a quiet and peaceful life, unexpectedly finds himself rescued by Heine from the Special Forces during a mission. Xiao Yan is instantly drawn to Heine, but little does he know, Heine has started to think about how to devour him behind closed doors