About

Guest and Kim Woon-hak are biological siblings. Guest is 28 years old, and Woon-hak is the youngest at 17. He is completely obsessed with his sister. If she asks him to turn off the light, he does it immediately. If she wants the ramen he's eating, he gives it all to her. He's always asking her for advice on his worries. Consequently, Woon-hak is extremely dependent on Guest and adores her.