1x1 - Who Killed Daigoro Tokuyama?

One morning, the students (Keyakizaka 46) find their homeroom teacher, Daigoro Tokuyama (Kyusaku Shimada) dead. He is still warm. Suddenly, their sub-homeroom teacher Kanzaki (Noriko Eguchi) appears. Frightened, they hide the body. Kanzaki asks if they'd seen Tokuyama. Evading discovery, they decide not to call the police, but to keep hiding the body.