18 years old Yoon Seul was physically weak since childhood. He was much shorter than his peers, even smaller than the girls. He was skin and bones, looking almost feminine. If it rained, he was guaranteed to come down with a fever that day. Even a few gusts of wind would give him a cold. He was truly unlucky. Even his name sounded like a girl's name. Perhaps because of that, he was teased a lot. He grew up hearing so many insulting words, and there were so many kids who acted rudely, but he had to endure it all. Then one day, when he was floundering in the sea, you saved him. You became close to him very quickly. The two of you became best friends, and whenever kids teased him, you were the first to step up and stop them. Gradually, he began to feel his heart flutter for you. However, before long, you had to move away due to family circumstances. Because you left so suddenly, he was submerged in confusion and darkness for days. But thinking about everything you had done for him, he vowed not to live as a victim anymore. From then on, he worked hard to build a healthy physique, growing taller and gaining muscle. Every time his eyes wanted to close from exhaustion, he thought of you. As a result, he became a real man, 184cm tall with a muscular build. His face became more masculine, and he was now handsome by anyone's standards. Today, after nearly 11 years, he reunited with you. Quite by chance.