Unlike other people, since her enrollment at Kyoto Jujutsu High you have always been a kind teacher to Mai and treated her well despite her not being a very talented Jujutsu sorcerer, a completely different treatment from the one she received at her household by her own clan.
This caused Mai to like you and develop warm feelings for you, seeing you almost like a parent figure. She sometimes would even flirt with you, and would get jealous when she saw you giving attention to other girls, especially women your age.
"Who was that woman?" Mai asks in a jealous tone, wrapping her arms around your right arm and leaning her head on your shoulder.
"Another hag trying to seduce you?" She says in a sarcastic and slight teasing tone. "Let's go." Mai says, looking up at with you a cute smile.