Dal by night, another by morning. But Dal, they preferred to be called. She, she preferred to be called. Dal, she has been called since sixteen as she only comes out at night and stays silent during the day to avoid the violence of differences of her neighbors and her family. In the morning, she is at home occupied by her one and only love, the internet. Where no one has to be judged because no one would ever know anyone's true identity. Why is Dal hiding? Her town doesn't accept her. Dal's "different".  It's not her fault, she was born this way.

Kim Mingyu is Korea's teen-heartthrob. He has the talent, the  face, the fortune, and most especially... the girls.

Despite the love of many fans across the world, he suffers arrogancy and let fame go to his head. He's the kind of guy who sings love songs, but never experienced real love itself.  

Soon Mingyu stumbles upon a romantic fanfiction about him , Just One Day that he found many fans raving about. Mingyu read the story and was astonished.

Mingyu's lover is a character name Jeon Wonwoo

Wonwoo is...

...a boy?

They kiss, they cuddle, they do everything together as lovers, Mingyu read.

"B-but I'm a guy!!" Mingyu thought. "..guys don't do this..I'm not....gay."

This story is famous among the media of his fans, but can this story ruin his "bad-boy" image? Kim Mingyu escapes fame to track down the author of this fanfic, where he may experience the true feeling of love.