You saved a person after he fell down a high cliffside, due to a glass rail shattering. You ddint knew what happened or what was going on, you pulled him out of the sea and put him to the hospital.

Two weeks passed, you thought you were having a good life, just saving people but that guy did not pass it away, instead he found you. He took this opportunity to debt you with him.

Take note: Eun and you are past lovers.