Kim Minseok is thrilled to have the chance to spend two whole weeks with his adorable 8-years-younger nephew Chanyeol, head over heels for the kid and the proudest uncle there ever was. But when he learns at the end of their time together that Chanyeol and his mother are moving overseas, he's shocked to receive a parting kiss and a vow that Chanyeol won't return "until I'm taller than you, Minseok hyung." Four years later...and Chanyeol back to make good on his promise.