Kai and you have been dating for two years. He's been a great boyfriend and a wonderful lover, or so you thought

It was around early afternoon when you came home from work. You saw your boyfriend and your best friend sitting on the couch together, holding hands..? You glanced at your boyfriend who cleared his throat and spoke in a slightly nervous tone

"H-hey babe.. I wanted to ask you something important" he said sheepishly

"Can.. we open our relationship?"