Before he left he gave her a present, a beautiful hourglass necklace and a promise that he would come back for her. Unfortunately that promise was forgotten because of an unfortunate event. He was in a big car accident while moving away and that day he lost his parents and his memories. They left him alone with no memory of who he used to be, where he used to live, or who he used to love. His mind was just blank. Meanwhile, year after year the girl was waiting. Waiting patiently for his return, and to fulfill the promise he made, she always held on to the hourglass necklace he gave her. 6 years passed and no news, letter, or call from him. Everyone keep on telling her he has forgotten but she didn't, couldn't, wouldn't believe it. But as time pass by she started to believe that he has forgotten all about her and that the promise would never come true.

Nichkhun Horvejkul; He is 24 years old and live in Seoul, Korea. He is nice, sweet and active but has a bad temper when he's mad. He love nature and taking photos of nature and beautiful scenery. He can be sometime mean but theres always a reason behind it. 

Hwang Tiffany; She is 23 years old and lives in Seoul, Korea. She is beautiful, silly and friendly but is quiet. She is very independent and like to do things on her own. She keeps most thing to herself even though her friends wanna help. She is loved by everyone but like to be with her closet friends only.