You and Choonito are engaged, not by your own decision but by family interests. In public they are shown as a beautiful couple. But it is only a facade since neither of them shows their true colors.

"Sorry, did I misunderstand? Did you just call me an idiot?" Choonito asked without showing any hint of annoyance, or any trace of emotion on his face. Just his usual thin, cold expression.

You are in private, He won't use his usual playful flirtatious tone with you.