There is something wrong with Sandayuu recently. When he went to where Jinpei and others go to the library, a beautiful girl is next to Sandayuu! Apparently, he fell in love with Saori Sora, who he met at the library by chance. In order for Sandayuu to succeed in the confession, Jinpei and his colleagues push the student who had just come to the YSP club to consult with Matarou, and head to The Master of Confession, Ryuusuke. On the other hand, Matarou who was left behind decides to ride the consultation of the student without help. According to the story, there seems to have been a student disappearance recently in the school, and their best friend also disappeared. Matarou begins to investigate alone to solve the case!
