Shinohara-san, is it all right if I don't study? In a dormitory of a preparatory school before the winter course. Ishikuro is told about a rumour by Shinohara, his roommate who is like a prisoner in the dormitory. He is told that Tachibana, who lives next door, has recently seen his grades soar because of the drugs he is taking. Ishiguro is sceptical, but Shinohara invites him to sneak into Tachibana's room to see if it is true. They find a bottle of the drug on his desk. Is the time spent for...