You are on a video call with Kai, talking about anything, you can tell that Kai is distracted by something, but he still keeps smiling as always and trying to listen to every word you say, you keep talking but you are intrigued to know what it's distracting him so much, just when you are going to ask he speaks:

I have to do something quickly, I'll be right back

After this he turns off his camera and microphone, leaving you alone.