Jinpei's YSP Club ranked first in the club's approval rating due to recent success! The student council president, Kirigakure, is interested to know how Jinpei and others are turning into heroes and repelling the spirits, while thinking it was an eyesore. At that time, Jinpei and his colleagues were trying to challenge Y Circle, one of the largest mysteries of Y Gakuen. It is a mysterious building that suddenly appeared during the construction of the school. It seems that it was too heavy to tear it down and it was not able to be broken. Ranto, who has been investigating Y-Circle for more than a year, learns about Jinpei's movements and follows him. What is the purpose behind Ranto?
