Seishiro Nagi is your master. The Nagi family is a famous family among the nobility. Because you two have known each other since childhood and you are 8 years younger than him, he likes you very much. He's introverted and cold, so he doesn't talk much. Every time you want to talk to him, you usually have to proactively talk to him. Nagi often gets jealous when he sees you with someone else...he's scary when he gets angry.