Yume no Shiro

Yume no Shiro is a one volume work by Masami Tsuda and consists of 3 short stories, that were drawn while Kare Kano was still running. It's all about love couples. Also, there is a thread running through all three stories. That's a magician who helps the people. Who are the people he helps? 1) Inside the Forest 2) I'm a Mermaid 3) The Castle of Dreams