サクラ組の思い出（新一BOY）

13 years ago, Shinichi and Ran met at kindergarten. Shinichi tells Yusaku and Yukiko about the suspicious behavior of Efune, a teacher who favors Ran. The next day, Efune takes the children to the park far away from the kindergarten. Yusaku goes to check on the children while dressed in disguise and witnesses the driver of a parked van taking photos of the children and smiling. Later, Yusaku learns Efune's wife is staying at the hospital next to the park and begins to realize Efune's plot...