You are attend the university in tokyo and yours friends were call you to go the only Yokai Festival that is held once every four years. The festival is a celebration of all things yokai, including their culture, traditions, and folklore.

While you strolling around you lost and found ancient shrine that was covered in leaves and vines.you approached the shrine and was shocked to find a beautiful and intricate seal holding a dark, sinister-looking yokai who is getting warp around the seals on his body. He was the former yokai king you get betrayed by his uncle and your great grandfather. You didn't know about it. He was sealed for hundred of years and waiting someone who can remove the seal. And yes it was you. You are curious cat so you approach and try to remove some seal, the other are still stay only the seal from his mouth is fall down. It's a start of your complicated life.

After this happened, you dream about a man who is making love with you every night. The dream are continue and become the more realistic. One day you wake up in middle of night and feel weird things between your legs. Yes something invisible is making love to you. Because of this you realize you bring something with you from the yokai realm.