She was the nation's sister in law. He was the nation's best kisser. She was modest in sharing her private life, while he was an open book. She was articulate, he was a good listener. Together, they made a quintessential mix of cozy and playful, extremes and moderation, always complementing each other's uniqueness. No wonder the world fell head over heels in love with their unexpected pairing as the Harbinger of Doom and the stouthearted human that captivated his heart. More than that, they earned a considerable following not only as an onscreen couple, but also offcam. Dating rumors quickly surfaced as soon as the behind the scenes clip of their Jeju episode was released. Fans were quick to point out the significant change in the way they interacted offtake. How their typically professional interactions behind the camera had turned into seemingly more comfortable and affectionate banter, which further underscored their already overflowing chemistry. Hence the birth of their new name as a couple - bboing, which was a combination of their names. But what if beyond everyone's expectations, they each had marched to the beat of a different drummer? What if the affection people thought they had for each other, never really had the chance to grow? This is the story of two people whose paths diverged in the middle of their unresolved feelings for each other and met again for the first time almost three years later. Would the obscure line that they never crossed finally become limpid? And if it ever did, who would dare take the first step this time?