Story was a bunch of unexplained, overcomplicated nonsense about a supernatural phenomenon called Adolescence Syndrome. This phenomenon seems to occur a lot around the main character. Why? Your guess is as good as mine. The redeeming quality of this show is the characters were good and the dialogue was interesting...until you hear the conversations trying to shoehorn scientific explanations to try to resolve the supernatural phenomenon.
You can make the argument that the anime is trying to draw parallels to real life issues and mental conditions. I personally didn't enjoy the show unfortunately. In my opinion the plot was overcomplicated by trying to merge slice of life and fantasy elements which didn't work for me.