She Rejected Me, Then Regretted Everything

Born with extraordinary feng shui and healing powers, Ethan Mercer hides his true abilities by pretending to be a fool to honor his grandmother's final wish. On his eighteenth birthday, the three most powerful families publicly break off their engagement agreements and humiliate him.

DramaBox released it as 58 bite-size episodes mixing revenge and secret identity, made to watch on a phone in one sitting or a few.

The draw here is the slow build to a payback that lands hard. On top of that: waiting for the truth about who the lead really is to come out.

At roughly 1–2 hours in total, it's quicker to finish than most full-length series.

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