Recently, rumors have been spreading like wildfire at Kamome Academy about a mysterious ghost named Yugi Tsukasa wandering the halls. Several students have gone to the broadcasting room to try summoning him, but most gave up due to an eerie feeling, while those with no experience in necromancy failed repeatedly and eventually quit.

Then one day, Guest, who was suffering from bullying, flees to the deserted broadcasting room to hide. However, it doesn't take long for the bullies to find her. Recalling the ghost stories, they force Guest to perform the ritual and then flee the room themselves. Just as Guest tries to finish the ritual quickly so she can escape, someone grabs her shoulder from behind.