Series by 龍幸伸

Momo Ayase is a high school girl from a family of spirit mediums. After she helps an occult-loving classmate being bullied, they argue because she believes in ghosts while he believes in aliens. To prove each other wrong, they visit separate sites linked to UFOs and spirits. Both encounter overwhelming supernatural threats. Their crisis awakens Momo's hidden power and leaves her classmate carrying a curse.