If you're looking for manga similar to Lonely Castle in the Mirror (Novel), you might like these titles.
Minori is an illness-stricken, constantly bullied orphan. After one rainy day, she doesn't turn up at school, having been admitted into a hospital in a distant town. Two months pass, and the girl's two school friends, Takashi and Kyouko, receive a mysterious email with no sender listed. The email reveals a summer festival taking place at a nearby town.
Ichitaro, son one of Shabake Edo's leading shipping wholesalers, is weak and is not allowed to go outside. However, I witnessed a murder on the night I went out ...!? Ichitaro can also see spirits.
Middle school left Uka Ishimori with nothing but scars—to the point where she's forgotten how to laugh or cry or even say “hello.” But a chance reencounter with a boy with lemon-colored hair invigorates her, giving her hope that maybe, just maybe, life can be that much sweeter if she finally reaches out for help.
In a world filled with airships, the Kaitou Queen is someone who never fails to steal what they are after. Their age and gender is unknown. However, a mysterious circus troupe appears, with magicians hypnotists, and those with other special powers in its ranks. The circus troupe manages to steal the gem that Kaitou Queen is after, and challenges Kaitou Queen to a contest.
A bizarre set of mysteries have befallen the Kuonji household. Kyoko Kuonji is said to be with child for the last twenty months, and her husband Makio disappeared a few months prior to the prgnancy. The odd circumstances have left the family with no one to turn to for help, until a freelance writer asks his exorcist friend to take on the case. The catch—the exorcist does not believe in ghosts. To Akihiko “Kyogokudo” Chuzenji, the supernatural is as much metaphysical and mental as it is unearthly.
One thousand years from now, humanity live pastoral lives aided by psychokinetic powers and the subservient Monster Rats. Saki Watanabe has just come of age, and her power has been reined in through meditation and hypnosis. She joins the Unified Class, where she will learn about her power and the world around her; yet so much of the truth is kept hidden. Her friends Shun, Mamoru, Satoru, and Maria share in her curiosity, and decide to go out of their way to seek the truth. But will the secrets of the past and present turn out to be things that Saki really wants to know?
In the near future, humans will communicate almost exclusively through online networks— face-to-face meetings are rare and the surveillance state nearly all-powerful. So when a serial killer starts slaughtering junior high students, the crackdown is harsh. The killer's latest victim turns out to have been in contact with three young girls: Mio Tsuzuki, a certified prodigy; Hazuki Makino, a quiet but opinionated classmate; and Ayumi Kono, her best friend. And as the girls get caught up in trying to find the killer—who might just be a werewolf—Hazuki learns that there is much more [to their monitored communications] than meets the eye.