Cast:

Lee Soonkyu / Sunny

She’s Yesung’s girlfriend, a year younger than him. A quite emotional girl. Always mad at Yesung but loves him very much.

Kim Jongwoon / Yesung

He’s Sunny’s boyfriend, a year older than Sunny. he’s a very patient guy. He can handle Sunny’s emotion because he loves her a lot.

Kwon Boa

She’s Yesung’s classmate, Sunny’s sunbae. She doesn’t like Yesung dating Sunny and pity him because Sunny always scolds him. She loves Yesung.