Hokenshitsu de Dakishimete

Manaya and Tsuruga have reached an understanding regarding their new relationship. This understanding entails that Tsuruga acts according to his own desires while Manaya does his best to manage the situation. As usual, Shinonome follows Tsuruga's commands and fulfills his role as a guardian. But Shinonome was not always the assistant to Master Kiyotsugu. What is the enigmatic past of the wizard-like Kaoru Shinonome, and how is Tsuruga's older half brother Naufal involved in it?