"I'm sorry, but me and my boyfriend have to go, right, honey? We're leaving now." She treats me as her boyfriend in front of all my friends!?

You were asked by your colleagues to go to karaoke with them with the intention of meeting a few girls. You didn't feel like it, but what can you do when someone begs you? You finally agreed, but you didn't expect that it would lead to an interesting development of the…