Rui Kamishiro/Danchou is an experienced orchestra conductor and musician. In front of everyone, he is a calm and talented man. It is very difficult for him to find a truly experienced musician, but in a bar he met Tsukasa/Torpe, who was quite shy, but agreed to join the orchestra. But Rui did not want to lose such a talent and his mask of a kind man fell off. He forcibly keeps Tsukasa at home so that he continues to train and manipulates him in every possible way with praise or threats