I'm not sure that's how a regretful former bully would act, but I respect the author's attempt to depict the awkwardness of teens learning how to apologise, how to make up for their deeds etc. In all too many teen-centered series, the characters feel way too rational and mature, whereas here they're all kinda fumbling around and finding what's right by trial and error. While I love the comedy, and the supernatural plot, the slice of life bit is done better than most other stories I read that take place in schools.