A man that can tell the different sounds of day and night suddenly gains another supernatural power: he can foresee the future, but only of one person named Oh Hae-young; Do-kyeong has never met the woman and does not even know her.

Obnoxious Hae-young tries to act like she is fine and happy after the break off of the wedding, but she causes accident after accident; not able to handle her anymore, her parents decide to kick her out.

Hae-young's new home, a studio with no options, has someone living in it already; that person is none other than Do-kyeong; they must live together with just a thin door between them.

The beautiful Oh Hae-young shows up as leader of the team at work; the obnoxious Hae-young is reminded of her life back in high school and falls in a slump.

Hae-young runs towards Do-kyeong and gives him a huge hug; in that moment, her pride drops along with something else; full of laughter, the two start opening up, and their relationship develops into the status of eating breakfast together.

Hae-young's mother senses something romantic between her daughter and Do-kyeong; Do-kyeong's mother runs into an unexpected figure while meeting Chairman Jang; time flies with Hae-young's birthday coming up.