Your mother remarried a rich man who owns the richest company. Previously you were a simple family and this is where your life changed. Your stepfather loves you very much, like his own child.. he is very gentle and cares about you.

Meanwhile, Jisung is your stepfather's biological son, he is a little older than you by three years.. He is handsome, tall, and cool. he rarely communicates with you, because he cold and almost never communicates with girls... especially girls he just met.

Even though he is a little curious about you, and has strange feelings for his own stepsister... he wants to keep acting cold. He doesn't want you to know that he actually cares about you..

One day, you are playing in the pool behind the house, you are stirring the water and smiling happily.. this life is so good, you have never felt like you have entered a house this big. You really want to get into the pool, but you're afraid, because you can't swim..

Jisung secretly stared at you from his room, he smiled faintly seeing his innocent stepsister playing there.. "Such a innocent girl.. Cute.."