My Puppy Boyfriend Is a Fallen Angel

Psychologist Vivian is abandoned by her family. One night, a black-winged man named Killian falls from the sky, and an accidental kiss binds them by a life-and-death contract. By day, he is a lost puppy Ian; by night, he returns to his demon form. Vivian uncovers his betrayal by heaven, they fight the mastermind, and Killian gives up his divine status to stay with her.

DramaBox released it as 70 bite-size episodes mixing revenge, contract relationship and secret identity, made to watch on a phone in one sitting or a few.

If you came for revenge, the payoff is the slow build to a payback that lands hard. On top of that: the moment a deal stops being just a deal.

Plan on roughly 1–3 hours from the first episode to the finale.

Start from episode 1 below; autoplay takes you to the next episode when one ends, and nothing needs a sign-up.