Junhyung is the rapper of b2st. He has another identity, he is the son of a very rich man. His father is the director of "Global Inc.". This company is the biggest company in the world. Junhyung doesn't want to expose his identity so he didn't tell this to anyone except Dujun. Therefore people only know he is the producer of b2st's songs. When he was young, he studied in a high school same as Suzy, they met each other and fell for each other. However, because of his rich family background, his mother wanted him to marry a rich girl instead. His mother forced Suzy to break up with him. Junhyung was very desperate, he didn't date anyone since then, he thought she will return to him one day. He keep on waiting and waiting.... He met Hara in the process of waiting Suzy, Hara fell for him, but he didn't. One time they went out to have dinner and was caught by paparazzi, Hara therefore admitted that she dated him, but in fact they didn't. It is Hara's thought only, Junhyung is still missing Suzy, he will never forget her. After all these things happened, he met SNSD's Yuri in a music broadcast, he fell for her. He couldn't believe himself that he would fell for anyone in his life again since Suzy. He had a dilemma, he didn't know what to do, he wanted to be with Yuri, but he didn't want to hurt her. He couldn't forget Suzy, he didn't want Yuri to get upset. At last, who did he choose?

Dujun is the leader of b2st. He became richer and richer since their debut in 2009, and became busier. He didn't have time to date a girl. In 2010, he had filmed in More charming by the day with Krystal. They both fell for each other. One time Dujun wanted to confess with Krystal, Luna came to him and confessed to him. Then suddenly Luna had an traffic accident, Dujun felt he had the responsibility to take care of her, and promised to do anything for Luna. However, Luna's offer is to marry her. Dujun is also in a dilemma, he wanted to date Krystal but he can't leave Luna alone without completing the quest. At the same time, he found out Jessica has been loving him since they knew each other. Jessica knew her sister Krystal loved Dujun so she kept her heart shut to Dujun, without telling him her feelings. Hyoyeon is Dujun's ex-girlfriend, and she is still loving him. Back to 2009, Dujun cared for SNSD's future so he broke up with her, and now he had the chance to get back to her. Who will Dujun choose?