Spoiler Warning!! [+/-] Show/Hide Synopsis...
The annual Watanagashi Festival finally starts, and everyone has fun feasting and playing games. At school the next day, Keiichi finds out from the chief police officer, Oishi, that Tomitake was found dead and a friend of his went missing. He learns that one murder and one disappearance has occurred every year on the day of the Watanagashi Festival, ever since the initial dam-construction murders. Oishi asks him to be a police informer, and to keep their collaboration a secret from his friends, who may be involved. That evening, Rena makes a surprise visit to Keiichi's house and eavesdrops on his phone conversation with Oishi, without him ever knowing she was there. Keiichi's growing paranoia leads him to take a day off from school.
