After 15 Years

Synopsis

15 years ago. Everything WAS fine. Sweet sour memories they shared together. For Jisoo, 15 years away isn't something much. She can still wait even for the next 15 years. But did she? Will she? Is she? 15 years without any news, calls, messages nor e-mail. Was it okay for her to accept someone, who suddenly come into her life, saying "I was your friend.. Oh, no. I AM your friend. Atleast, for this 15 years."

"Yah! Who are you to have my permission sitting here?" - Kim JiSoo

Suddenly bumped into Lu Han, the unknown at the airport, change Jisoo's life again, not after that guy called Park BoGum. "Yah! Look what you had done with my shirt. Oh, shit!" - LuHan.

"You may forget me, but I will try to make you remember me." - Park BoGum.

What did happen in this 15 years? Who's Luhan? Does bumping into someone anonymous is a big sin? And what's actually her relationship with ParkBoGum? Girlfriend? Friend? Enemy? Stranger?