Ken is in Aloha on his path on becoming a better and stronger person on his way to be able to battle his dad in a battle. He wants to be like him one day. There will be villains and rivals and friends and many ups and downs.
kenma was bullied by kuroo and sakusa, because he was "too feminine" when kenma leaves, he meets atsumu, who teaches him self confidence and badass.
but when they come back, the two try to bully kenma and atsumu but they didn't think kenma changed after the two years.
also @Cuccigucci helped me with this story idea :D