Seojin, who was adopted by a family and taken to Germany, met someone else from Korea, Han Jei. Seojin was very attracted to Han Jei and remained by his side as his "best" friend for 15 years. Suddenly, Han Jei tells Seojin that he will soon marry a woman. After Han Jei's sudden marriage announcement, Seojin, who works as an airline captain, realizes that what he feels for her is more than just friendship. He left his job and moved to Korea to escape. However, Han Jei impulsively goes after Seojin, who has no idea what is going on. Han Jei wants to keep Seojin by his side as a friend because he is special to him. As things became more and more complicated, he started to feel something was wrong... "Does my marriage mean that much to you?"