For the daughter of the head of the school, Emma Daiouji, Jinpei and others who will get one of the seven wonders of the school, "Chocolate for predicting the future", known as "Fortune Bitter Black". It is taken by the senior Ryuusuke Kyuubi who "had reserved" though it lined up in the large procession which continues from the "Chocolate Factory" of Cha Li in the school, and he got Fortune Bitter Black at last. When Kyuubi tasted one, he said, "Thou shalt, the fruit of the beautiful peaches! The cheek is stroshed by the wind and it is Chin! There is a paper called. Then suddenly Kyuubi floated, and he had been flown somewhere with tremendous force.
大王路エマのために、学園七不思議案件のひとつ「未来を予知するチョコレート」を手に入れることになったジンペイ達だったが…。
超エリート校・Y学園には、多くの謎が存在する…。その謎に立ち向かうのが「YSPクラブ」。彼らはなんと「妖怪HERO」へと変身することができるのだ！そんな彼らに、妖怪史上最大の謎解明ミッションが下される！
ジンペイたち「YSPクラブ」を待ち受けているのは、輝かしい未来か、それとも…？まだ見ぬ新体験が、キミを待っている！
Y学園…いや、この世界最大の謎を解明せよ！！
