Sinb is known by many people as a good girl. She mostly she wants to keep to herself as she strives to be perfect. She loves her girlfriend Umji, who she's been dating for 2 years. Umji is a really great girl; she's kind, warm, smart and cute. But Umji has a secret that Sinb doesn't know about yet; she has a stubborn sister named Yerin. Yerin is the opposite of Umji; she's so selfish that she only looks out for herself, and she does what she wants to do without regarding other

Hwang Eunbi lives a boring cycle of working at the office and returning home to her caring girlfriend, Sowon. Only in her dreams, Eunbi experiences a new kind of love: a black haired girl who disturbes her sleep visits her every night, which leads Eunbi to wish staying in the oneiric realm even if her reality tears into peaces. Who is this girl? Will Eunbi and the girl of her dreams eventually meet in real life?