Hyorin somehow ended up living with 12 hot guys. What could possibly happen with 12guys and 1girl living together.

She's not pregnant. He's not going to be a father, but one night a mishap leads Oh Sehun to concoct a plan that kills two birds with one stone: saving himself from marriage with his mother's best friend's daughter and buying time to wait for his girlfriend to return from abroad. Plans begin to go awry when his girlfriend's heart changes and Namjoo has already left his home. Sehun ends up scheming to bring Namjoo back only to face turmoil again. A jealous ex and a nosy cousin. Thrown into the