Why Do I Love You So Much? (SJ + TVXQ)

[This is the story of eighteen boys, from their youth all the way into adulthood. There are fateful encounters, unwavering convictions, and clashing temperaments. Above all, there are feelings so unforgettable they will be remembered for a lifetime.] [As time goes by, the feelings of youth lead to different turning points.] [There is more than one road to happiness; reaching a happy ending is not the only one.] [The person who was there at the beginning is not necessarily the one you are destined to return to.] [Nor does leaving mean you no longer love someone.] [Love takes countless forms, and without a doubt, having the one you love is the most beautiful and dazzling rainbow of them all.] [Why do I love you so much? Who once softly sang those words in your ear?] Main pairing: Geng Che, Hua Yun Mi Main pairing: Hee Hae Soo Main pairing: Te Mi Yi Tong Main pairing: Hyun Tu Xu Main pairing: Qiang Yuan Main pairing: Fan Min