This story I read was written by Joan Elliott Pickard. This story made me think of Girls' Generation's Lee Soonkyu or "Sunny" for short.

Regrets will always be in the end. When you have no one in your side, you would find the people who were with you all the times when you had your problems, the times when you had your best day, when you're sad.. you would find the person who stuck with you all those times. 

Since they were kids Hyoyeon (8 yrs old) and Eunhyuk (11 yrs old) have been childhood friends together with Doojoon (8 yrs old). They played together, ate together and even sleep together after playing. One day Eunhyuk had to leave the town due to family reasons, Hyoyeon and Doojoon were so sad that there’s only the two of them that could play. After 13 years of separation they have become more matured physicall