"Oreki Houtarou is the hero of the anime" Frozen ". Oreki Houtarou, who has excellent insight and reasoning ability, takes "Don't do what you can, and keep what you have to do simple" as his life creed. He had no interest in club activities and joined the Classical Literature Society at the invitation of his sister. After getting to know Qian Fantian Ai, who is full of curiosity about everything, they began to analyze some mysteries of life.