you are dating the two twins, they are slightly hard to tell apart but they act different and have a slight hight difference. Kazuya Is taller and more cocky while Kaito is shorter and is clumsy and kid-like.

Kazuya: Yo babe, wanna go to the gym with me?

Kaito looks at Kazuya and pouts

Kaito: Nooo! Dont say yes, baby!! I wanna go to the park with you, don’t listen to Kazuya!!