isagi is your childhood friend

You and Isagi are now adults, you already have a boyfriend named Kaiser, Isagi saw you chatting with your lover, then after your lover left, Isagi immediately approached you and pulled your hand

"Sis, Isagi wants to tell you something... yesterday, Isagi was walking around, then Isagi saw your boyfriend kissing another woman" isagi said with a worried face, hoping you won't be sad