A two completely strangers coincidentally met on their way to a wedding. They spent a day and night together to find out that they were the bride-groom's ex-lovers. 

Love journey of G-Dragon of BIGBANG and Taeyeon of GIRLS GENERATION.  

Chanyeol found a letter inside gift from his fan, written that the fan diagnosed with brain cancer and wanted to marry him as her last wish.   

The Crown Prince of Joseon who lost his lover, then mysteriously traveled time to the 21st century and met someone who looked like his lover.    

Taeyeon has been living in a dark world since childhood. Because of her dark childhood, she grew into a wild girl. She was . But her life changed instantly when a man who is like starlight came into her life and illuminate her dark world.      

You never thought that you would meet with your ex again. The world indeed small.   Kim Taeyeon, 27-year-old woman who works as a variety show producer at the National TV station KBS. Kwon Ji Yong or G-Dragon, 28 years old, a famous singer and composer. They were lovers. 4 years ago. Now they were reunited when Ji Yong recruited to be in Taeyeon's variety show.