Abandoned by his first love only to find her five years later as his and his fiance's wedding planner, Bang Yongguk is determined to make Im Mani feel the pain that she put him through.

“I want you to experience a true marriage – not an arranged one.

After 15 years of marriage, things just weren't the same anymore. The love and attraction was slowly drifting apart. Old habits came back and parenthood soon became a bond between a parent and child only—not a partnership. When they laid eyes with each other, there wasn't a spark anymore; instead there was a glare. Angry words became louder which erupts into a heated argument. 

The heart has boundaries in which they stop us from doing what is morally incorrect. However, to what extent does this boundary go to? Will it fall into the desires of lust or will our morals override this irresistible sin?

 Lu Han. Kwon Heeyeon. Oh Sehun.