A love story between an older sister and a younger brother. They first meet in a bar, where Lu Yunzheng steps in to rescue the heroine, Gu Qianran, from a man harassing her.
Gu Qianran: Looks like a sweet little kitten, but she's a shameless pervert on the inside.
Lu Yunzheng: Looks like a cool, aloof younger guy, but he's a schemer at heart.
Gu Qianran: “This is over between us, Lu Yunzheng.”
Lu Yunzheng: “Sis! Sis! I want to hide you away and tie you up so you can't go anywhere, and have to stay by my side.”
Lu Yunzheng: “A Ran... What do I have to do for you to forgive me?”
