Minhyuk -main character, 18, fun, cheerful but can be serious, kind, popular with people

Nina -main character, 17, serious most of time, not good with people, open minded, somewhat quiet, old/mean but doesn't act like that at home and not as much to her friends

Yongguk -friends with Minhyuk, laid back, quiet, popular with girls, cool, tough

Sandeul -friends with Minhyuk, super cute, enthusiastic, cheerful

Kalinda -friends with Nina, outgoing, adventurous

Melody -friends with Nina, watches out for her friends, friendly, the plan maker