Oh Sunhee: 20 years old. Cheerful and bright, clumsy, blunt, talkitive, and a bit on the childish side. An optimistic college student wanting to get a jump start on her career. Older sister of Oh Sehun. People often mistake Sunhee as the younger sister instead because not only does she look younger but acts even younger. Sunhee sometimes doesn't know when to stop talking or putting filters into her words, which usually ends up with her getting in trouble. 

Jung Yunho: 26 years old. He's a bossy, impatient, hot-tempered man. He's cold and heartless with blunt, cutting words to match. Yunho may be young but he's already a successful business man who is respected by many. Doesn't know the meaning of fun but only work, work, and more work. He's a bit closed off and doesn't bother to letting anyone in, not even his family members. Because of his cold attitude, he finds himself plenty of admirers at his office, often competing to vie for his attention.

Oh Sehun: 18 years old. Shy, playful yet mature, protective, outspoken, and can't stay still to save