Yeah. You're right. Beeing teenager is the worst horror haha
A really like the artstyle. How nice and colorful in comparison to backgrounds are characters.
And plot is interesting and unpredictible. And stress system seems to be interesting. The nightmares. Teenage-time crysis. Exams. And all these depresion and feeling of being worthless :( + loosing sanity. it's kinda sad but also very intersting setting for the good story.
And it's rather long :)
Edit: I only don't understand the meaning of ending scene. She did what never could. She did what she always wanted to. She told what she always wanted to. But in my opinion it would be more interesting to know: what happened in this time in real world, how has her life changed and what happened after. Yeah ,the story need a good epilogue.