Sound director Park Do-kyeong starts to see hallucinations of a woman he doesn't know. Turns out to be Oh Hae-young, who dumps his boyfriend on their wedding day.

After her wedding is cancelled, her parents are on the verge of making her leave the house. She finds a small room to stay in, only to find Do-kyeong living right next door.

Hae-young and Do-kyeong don't get along well living with just a thin wall between them.

A different Hae-young, a more prettier girl, joins Hae-young as her team manager. The two had went to the same highschool, and were mocked for having the same name but different looks.

Hae-young and Do-kyeong grow fond of each other and one day even have breakfast together.

Hae-young's mother senses a fling between Hae-young and Do-kyeong, while Hae-young's birthday is just around the corner.

Hae-young and Do-kyeong gets in trouble once again. Meanwhile, Do-kyeong receives Hae-young's mail and someone appears in front of Hae-young...

Do-kyeong protects Hae-young's side. Meanwhile, Soo-kyeong talks about her old flame to Jin-sang and her past gets unvailed...

Hae-young finally finds a truth of her broken engagement. Meanwhile, Do-kyeong struggles with his unknown memories.

Hae-young keeps thinking about Do-kyeong. The contrasting memories from the other night bother Soo-kyeong and Jin-sang. Meanwhile, Do-kyeong's traumatic memory gets unveiled from the argument with Hoon.

Tae-jin and Do-kyeong get into a fight. Soo-kyeong gets mad at Jin-sang, but he still does not remember what happened between them.

Do-kyeong is unsure about his feeling to Hae-young and finds another part of his memories.

Hae-young ditches Do-kyeong. Meanwhile, Soo-kyeong keeps her pregnancy secret from everyone include Jin-sang. Do-kyeong and Hae-young make a different decision about their future.

Do-kyeong falls in love with Hae-young and ask Soo-kyeong for help. Meanwhile, Soo-kyeong finds something shocking about Jin-sang and decides to leave him...

Do-kyeong does not doubt his love for Hae-young anymore. Jin-sang tries to talk about Soo-kyeong's pragnancy, but she refuses. Meanwhile, Do-kyeong finally finds the truth about his memories.

Do-kyeong and Hae-young finally admit their love for each other. Meanwhile, Jin-sang and Soo-kyeong face the reality of their relationship.

Jin-sang tries to go back to his life after he is done with Soo-kyeong. Meanwhile, Do-kyeong finds another clue about his death.

Do-kyeong and Hae-young start taheir new lives as a couple. Soo-kyeong and Jin-sang starts their relationship again. Meanwhile, Do-kyeong prepares a marriage proposal for Hae-young.