Heaven vs. Hell short story

When a demon finds himself having a growing attraction for a mortal boy, he tries his best not to put him at risk and alert his guardian angel. When a fallen angel roaming earth finds out, he tries his best to keep the mortal away from the demon knowing it will only bring the mortal harm. The goodness in the fallen angel's heart comes to the attention of the guardian angel.

EXO fanfiction. Mild violence. BxB. Sulay. Kaisoo. Slight Layhan.