The Paranormal Investigation Club is busy again, researching yet another odd happening at Seikyou Private Academy – or rather, many of them! That's because Momoe has discovered a list of school mysteries that was hidden away in an old book, and now she, joined by fellow club members Teiichi, Yuuko, and Kirie, will attempt to solve these strange incidents one by one. From a match-making séance with dire consequences, to an old-fashioned bath that becomes haunted depending on the number of occupants, nothing will deter the group from uncovering the truth... no matter how ridiculous it turns out to be!
Tired of Yuuko's antics for causing more ghost stories to be spread among the students, Kirie challenges her to a series of games which if Yuuko loses, she must behave. To Kirie's anger, Yuuko wins the contest. Momoe shows an old letter she found which contains ghost stories which predate Yuuko's enrollment in the school to the Paranormal Investigations Club. The club decides investigate the stories one by one which leads to many funny moments and embarrassments for everyone. After investigating the haunted bath story, the club discovers that the letter was written in invisible ink by the "Paranormal Investigations Club". Momoe then realizes that the stories were written by the original Paranormal Investigations Club for fun before they became the third newspaper club. Realizing that they are just like their predecessors, Teiichi and the girls decide to wear yukatas and set off fireworks on the school rooftops that night.
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