Two people living in an extraordinary world within an ordinary town.

Takahiro and Yumiko were born and raised in a family of exorcists.

They are childhood friends and partners, but due to family circumstances, they are betrothed.

While aware of each other’s feelings, they maintain a pure relationship until they finish their studies.

The two are tasked with protecting the town from supernatural phenomena.

Following their duty, they track down the traces of a supernatural phenomenon that has recently been causing trouble in town.

Finally, the two corner the demon that is the source of the supernatural phenomena.

However, in the demon’s last desperate struggle, the two are trapped in a place that resembles a school.

It is an alternate dimension from which they cannot escape unless they complete a challenge.

Furthermore, Ren, Takahiro’s younger brother and the school’s chairman, also gets lost in the place…