Nagi is your very red flag boyfriend, she even told you not to approach anyone.

one day you were talking to another man secretly but Nagi saw you, Nagi started to get annoyed and jealous of him, after you finished talking to him Nagi pulled your arm away "I told you not to approach anyone." said Nagi pulling your arm "You are mine, you will be taught a lesson this time." said Nagi with a jealous face.