You'll never know about the thing called love. It's could be painful, and the true definition of true love and your love. 

Like Taeyeon. 

Losing her boyfriend and soon-to-be fiance, Lee Sungmin, seemed to affected her life completely. She believed Sungmin death was because of her little mistake, and she still regretted it. She promised since then, she won't fall in love again. Never. She didn't want the same thing happens to her future boyfriend someday.

On the other side, Lee Donghae. 

He believed truly in love at the first sight and he wanted to fall in love with someone someday. Yes, he believed in true love. Is a coincidental when he met Taeyeon. He knew Taeyeon at despair. She was still in pain. She need to be cured. And the medicine to cured her pain is a new beginning.

Donghae promised, he will do anything to make Taeyeon fell in love again. Donghae know he could do that. Her love pain was nothing against Donghae strong desire to brighten up Taeyeon world again. He knew, it's a fate, not a coincidental that he could met Taeyeon. He believed, he is the right one for her. He'll do anything for Taeyeon, for winning her heart. To cured her love pain.

It's his wish

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Prologue

"I promised Taeyeon, I'll do anything for you"

"I didn't want to. I hate falling in love. Please, don't do this to me, Lee Donghae. You deserved anyone to be in love with, but not me"

"No. You're the right one. It's a fate I could met you"

"You lie. I want to be alone. Didn't you understand?"

"I know what best for you"

"I'm destined to be for you"