Park Hyerin - She's just moved from America back to her hometown, Seoul, to attend college at Seoul University. She left everyone behind, her family and her friends. But she doesn't regret it because she always wanted to move back to Seoul. There, she meets her roommate who becomes her best friend and 2 boys who will show her around Seoul since she hasn't been there in forever and doesn't remember much. Who are the two boys? Who's the roommate? What's gonna happen? We don't know either ;D S

Mia's life is pretty complicated. She used to be a happy, cheerful, optimistic girl who was always smiling. But when a couple of things happen in her life, she changes into a stubborn, ignorant girl. She doesn't care about anyone and has no friends besides her best friend, Wonbin. What happens when a few guys just barge into her life and won't leave her alone? Does her life start to change? Does she start to revert to her old self?