Kyoshin to Hyouka no Shiro

It's Kyoto, and yet it is not. A microcosm of peculiar origins, "Mirror Kyoto". A small incident causes a young girl, Koto, to wander into this world. She runs into a mysterious monk, gets chased around by a tech-obsessed girl, and heartily enjoys her chaotic and colorful new life, but meanwhile, out of sight, a certain plan is being set into motion… In this mysterious city where spirits and humans have been thrown together, the festivities are about to begin!

Kakeru Miwa is an otherwise ordinary high school student, but a strange twist puts him on the front line in a supernatural battle against the menacing Oni. With the help of a fantastically powerful battle suit known as “Yoroi”, Kakeru joins an elite team that fights the monstrous Oni and defends humanity from otherworldly threats. The team is assigned to protect Oka Myojin, a shrine maiden who is prophesized to save the world, but she must perform a sacred ritual within Shikizakura, the horizon that connects the spiritual and physical world that lies somewhere amid the blooming cherry blossoms and the colorful autumn leaves. But in this world, the journey to destiny is hard-fought, winding and sometimes deadly.

Three kids are stuck in a strange city causing massive mayhem through the land. They are searching for an atypical rabbit in order to return home. Koto, the eldest of the three, seems to have some sort of connection to this weird place ruled by a monk, a demon, and a priest.

Yashiro Isana has lived a relatively ordinary, simple life. He lives in the technologically advanced Shizume City and attends Ashinaka High School, a notable high school that is located on an island just outside the areas. Yashiro is friendly with everyone. Nothing seems wrong about him, except perhaps his habit of forgetting where his school-issued PDA is. However, nothing normal has been happening since the recent murder of Tatara Totsuka, prominent member of the infamous HOMRA. No one knows who exactly killed him but the man responsible bears an uncanny, identical appearance to Yashiro. Seeking vengeance, the Red Clansmen of HOMRA set out to get Yashiro and kill him. Everyone suspects that Yashiro is the murderer.