Previously, two years ago, Alhaitham and Kaveh were lovers, but their relationship ended because of mistakes they made, as well as because of their contradictory nature. This also damaged the friendship between 4 Aggravate (Alhaitham, Kaveh, Cyno, Tighnari) because Alhaitham and Kaveh often refused to hang out, because they didn't want to meet each other. But it turns out, Alhaitham had to meet Kaveh again, when he was a new student, and when he set foot in the Sumeru Academic campus dormitory.