Yamazaki, a struggling screenwriter, hears a rumor that a strange group of people are living together in the mountains and engaging in dubious sexual rituals, so he goes to investigate. At a waterfall in the mountains, men were having a heated discussion on the topic, "Was Leonardo da Vinci gay?" They are reportedly holding a training camp here to settle a dispute on the internet. The leader, Verrocchio, is confident in the gay theory, but refutes it himself. Young Machiavelli is repulsed by his ideas. Melzi, a passionate believer in science, is worried about the relationship between the two. There was also Sarai, who advocated the Basho gay theory, and Borgia, who tried to verify it from Freud's theory...