As suggested by @JustBrea Sorry its so late. I honestly consider this ship to be an ultimate bromance. I like this ship very much:)
Taemin has already said that him and Kai are best friends. They are literally friendship goals
They act like brothers who really care about each other
They laugh, smile, and cry together and that's something only a true friend can do with you.
They even did a song together. It's called Pretty Boy! They killed the song...Taemin's singing and Kai's dancing is beautiful and sexy at the same time!!