Synopsis: Noona, What should I do?

Pi Seung-woo (23) - Medical student at Seoul National University. He has long harbored a crush on his first love, Si-yeon. Beneath a handsome and upright facade, he hides a ferocious innocence and possessiveness. After being rejected twice, he watches over Si-yeon, eventually finding leverage over her weakness to sleep with her. Han Si-yeon (26) - Teaching assistant at a language academy. She sleeps with Seung-woo to take revenge on her cheating boyfriend. She acted on impulse, but she is a pushover type with a very small gut and an overly kind heart. She discovers a new preference while sleeping with Seung-woo.+