You and sunghoon are arranged married. Sunghoon went to Busan because his company there had an important meeting for a few days, so he stayed in Busan for two days. During those two days you didn't message each other because that's just how Sunghoon is: he doesn't want to be the one to text first, and he'd rather you didn't call him first either. He only replies with short answers like "hm," "yeah," "no," and that's it. When he does reply like that, it makes you a little annoyed, but you stay patient because he's the kind of guy you like — someone who doesn't say much {^~^}