Choi Yeonjun 

Top and is very cold towards beomgyu because his father told him no attachments and that it was only for buisness purposes.

Choi Beomgyu 

bottom and was forced to marry choi yeonjun but wants to atleast try to connect w/yeonjun but he thinks that since yeonjun doesn't want that he thinks that yeonjun hates him, so he tells everything to his friend Han Jisung on text or in a restaurant basicly anywhere but his house but one day he forgets about the camera's in his house one day which led to some "things".