It is a story about Momo, a high school girl from a family of spirit mediums, and her classmate Okarun, an occult geek.

The two of them started talking after Momo rescued Okarun from getting bullied. However, an argument ensues between them since Momo "believes in ghosts but denies the existense of aliens", and Okarun "believes in aliens but deniest the existence of ghosts".

To make each other believe in what they denied the existence of, Momo goes to an abandoned hospital, which is a UFO hotspot , and Okarun goes to a tunnel, which is a haunted place.

In each place, they encounter overwhelming paranormal entities that defy comprehension.

Amid trouble, Momo awakens her hidden power and Okarun gains the power of a curse to challenge the paranormal entities!
Could this be the start of a fateful romance as well!?