On their way home from school, Mayumi Dojima and Manabu Sotoin are abducted by a group that call themselves the Twenties. They are after a secret hidden within the star that Mayumi saw ten years ago. The remaining members of the Pretty Boy Detective Club take action to save their friends and finally face the Twenties in a battle! What will Mayumi’s decision be after the search for the missing star ends?

Nagahiro loses to Lai, but the Pretty Boy Detective Club figures out the trick that Lai used to win. In order to battle Lai again, they sneak into the Reasonable Doubt Casino. But at the moment of the showdown, the detectives are met with an unexpected situation! What will be the outcome of the battle between the rival middle schools?

The artist who created the paintings found in the attic was a former art teacher named Kowako Towai. She was a suspect in a kidnapping case that happened seven years ago. How will the Pretty Boy Detective Club solve the mystery of the thirty-three paintings in the attic and the kidnapping case?

On the day of the elections for student council president, Kinshiro Yokuya, Mayumi’s rival candidate and classmate, sits next to her. Before Mayumi’s speech, Kinshiro sets his last trap...! Will the Pretty Boy Detective Club be able to protect Yubiwa Academy?