Deciding to go bowling after they are rained out for tennis, Ran, Sonoko, Masumi, and Conan are met by Makoto, who engages Sera in a fight after mistaking her for a boy interested in Sonoko. After this is straightened out, we learn that he was attacked by teacher Masahiro Tanba, who was drunk. His coworker Sunami Masaki took him to the car to calm down. Makoto soon leaves to nap in the car, not finding bowling to be his strong suit. After a while, math teacher Michiko Monna becomes worried about Tanba, and in going to check on him, finds him missing. They all check around the local bars, but the missing teacher is found drowned in a portable toilet, and Makoto becomes the prime suspect due to the strength required for such a feat. He also had the opportunity, remaining in the parking lot during the estimated time of death.