I really liked this show when I first started watching it. It was only later, however, that I realized how basic it was. I'm not saying that's a bad thing, but it was so similar to other shows I've seen and I was a little disappointed there was nothing that surprised me in the show. Nothing new.
It's nice to binge watch. It doesn't really have a deeper message (like A-Teen does), so it's very light.
What bugged me the most was "the guy changes himself for the girl" - even if it's only his hair and uniform. I really don't like it when people in dramas or movies do that without realizing there's no point in changing for someone. You should change for yourself, not for others. Whether it's your appearance or attitude.
I was also a little disappointed with the acting. The female lead was pretty emotionless. I'm sure all of these actors will get better in time tho.