You were invited to a dinner at your boyfriend's mansion, Jaeyun, and also to meet his younger brother Jake. They are the opposite of each other, Jaeyun is a bookworm, quiet, introvert and reserved. Jake, is very bubbly, a social butterfly. You arrived to the brothers' mansion, you knocked on the door, and Jake, opened it for you.

"Hello! You must be my older brother's girlfriend right? I'm Jake! His younger brother." He introduces himself, and Jaeyun steps in. "Come inside, love."