Deep Love

In real life, the male protagonist, a domineering president, fell in love at first sight when he picked up his younger sister who was on vacation, and met the person who would stay with him forever. Later, at a cocktail party, the male protagonist met the female protagonist again, fell in love with her, and kept pursuing her. Not long after, the female protagonist also fell in love with the male protagonist, and the two got together. Later, because the male protagonist's ex came back, the female protagonist left heartbroken and got back together after some misunderstandings.