Eunhyuk (Lee Hyukjae) has been searching for his love , from the first day becoming a SM Entertainment Trainee to a well-known K-pop idol . But , he could never recognized that his love is just beside him . The Only One who is always bickering , chatting , playing with him .

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  Someone said,'' The happiest thing in the world isn't being rich or famous, is having a soulmate beside you as you walk on the path of life. You believe that whatever is in front of you, that only person besides you never leaves you alone, but staying by your side forever more. If you have that Only One beside you, cherish him/her. 'Cause that person is precious.''

  ''Of course I will,'' Eunhyuk closed his book, and his brain is fitted with that person's images,'' I will never let go.''