Ever since they were young Kazuki and Katsuki have been polar opposites. Katsuki likes his hair spiky while Kazuki likes his smooth and silky straight. Katsuki was loud and angry while Kazuki was more elegant and kept his anger to himself. Katsuki started trouble while Kazuki resolved it. Even so, the two of them were inseparable. Kazuki was the anchor Katsuki needed.