Hazbin Hotel (Cartoon)
Of Saints and Sinners
by morningstar_writes
After destroying the hotel for the umpteenth time, Alastor makes a promise with Lucifer: in exchange for swapping compliments, learning to coexist, and becoming kind of friends, Lucifer will owe him a favour. (Falling in love was not supposed to be a part of that deal.) — in which they fight heaven, each other, and the urge to be together.