This is about a married man who is struggling to pursue his love or to end it. The girl that he loved before and 'till now had come back but is it okay to love her. If they have a chance, should they grab it? Even if people involved in their lives surely will get hurt. Questions revolving in his mind. Confused of what should he do. Should he go back to the one he really did loved or should he stay to his commitment, his wife and learn to love her.

Characters:

Choi Siwon: 

- heir of Choi Group of Companies

- husband of Yuri

- still holds on to the past even though he's already married

- wants to learn to love his wife

Kwon Yuri:

- daughter of the owner of Kwon Enterprises.

- a housewife

- a wife who truly loves Siwon

- Kyuhyun's childhood friend and closest friend

Im Yoona:

- Siwon's past love, the one that Siwon's mind thinks about

- wants to get Siwon

- holds a deep secret

Cho Kyuhyun:

- a young president of his company

- President of Cho Industries

- Yuri's childhood friend and closest friend

- always on the side of Yuri, he is her supporter

- a question runs in his mind does he love her friend Yuri or is it just that they're close like brothers and sisters

Lee Donghae:

- Siwon's closest friend

Choi Sooyoung

- Siwon's sister

- a friend of Yoona

Choi Minho

- Siwon's brother

- a friend of Yoona

Kim Taeyeon

- Yuri and Kyuhyun's childhood friend

.......... and more