A has-been girl group member (Oh Ji-won Miru) x male college student (Ahn Sae-won Cuby)
The heroine's perspective: The cute little brother cries every time he gets drunk. He's so cute.
Male protagonist's perspective: Woo hoo, I can't catch up with my pretty sister, I'm so handsome, I want to drink
Not in the entertainment industry, no prototype
Concept: Every time the cute brother pursues, he ends up in a drunken club.