It isn't the best. A few of your characters didn't have much of a personality. For example, The vocal team. Rather then describing their close bond with Dokyum, seeing them hang out with other members of the music club, talking to girls and whatnot, it seems as if the main reason they were placed in the story is to only sense dokyum's dislike to nari, or point out interactions between the both of them to keep the story going. I also heard very little from ahyeon, but she isn't really much of a main character so it's alright. Now, Seungcheol. My dear bias ( smh ). He seems too much of a playboy; hoping onto different girls at one time. He broke up with nari, and magically tomorrow he got together with areum. I found that really unrealistic. It takes time for someone to actually fall in love, or fully heal after a breakup. If seungcheol really wanted to break up earlier on, he would've seemed more uncomfortable or stiff when he was with nari. Now, the two main characters. Dokyum is fine. He gets along with people easily and forgives, is a seemingly nice person. However Nari on the other hand, doesn't seem so b***y as you described her. She really wasn't mean at all, just, moody at times. She also doesn't have any friends, so making her interact with Nana and Dani would bring more reality into it.