Jung Yerin

You. 18 years ordinary girl. Living with your annoying elder brother named Jinyoung. Sunwoo & Eunbi's bestfriend-forever. Cool and sometimes selfish. Hate your Jinyoung, but you love him from the bottom of your heart. Sweet and talkative.

Jung Jinyoung

Your elder brother. Currently study in university. He love to bullied you very much and seeing you cry. But, he's very kind towards you and have a gentle heart. Very annoying brother and likes to tease you.

Baro / Cha Sunwoo

Your bestfriend. Cool outside, warm inside. Have a caring heart. Really close to you after Eunbi. Because your relationship status being a bestfriend, is it possible to change into lovers?

Sinb become Lee Eunbi

Your closest friend. Very kind to you and sweet. Have same problem with you, that's she has an elder annoying brother too. That makes you feel that you and her were fated.

Lee Junghwan aka Sandeul

Eunbi's elder brother. Just like Jinyoung, he loved to teases Eunbi very much. (Honestly, he's being a cameo only XD)