kei would be spoiled rotten by taki hed be so evil but maybe happier tbhhh. where as in canon ktaki, takis fairly down to earth (while also being an overexcited dog energy) and kei spoils him and adores him and dotes on him and lets him get away w almost anything its not exactly spoiled Rotten the way i think age swap ktaki would be… like it would still be diligent responsible playful older one but kei is so much more neurotic than taki that i think he would be kind of psycho possessive sitting in takis lap at any given opportunity type of situation…