Theory

Someone was walking through the desert while eating a hamburger. Their friend says "You shouldn't eat burgers in the desert, you'll get dehydrated faster!". The first guy throws the burger in the lake when suddenly two sesame seeds get blown by a gust of wind, a black sesame hits the first guy in the face, while the white sesame was blown far away. The white sesame thinks the black sesame purposefully left her. The black sesame is worrying about the white one until Ness comes along and solves the issue!