I can try: (ill use SH for seunghyun)
In the past, Yuta and SH met when SH was climbing up the ladder of his yakuza role and did business in Japan. There, he met Yuta one of the male prostitutes but instead of treating him like one, they pretty much fell for each other. There was some sort of backstabbing going on with the deal or something and a shoot out ensued; Yuta saved SH while SH also tried to save Yuta. SH left and when he was going to go back for Yuta, someone instead came and told SH Yuta sent a message that he doesn’t want him to come back…for some reason SH believed the messenger. So, SH never went back for Yuta and Yuta was abandoned then raped and held captive by his old husbands son. (I think the old husband like bought him or something) years go by with this big misunderstanding between them and yutas husbands company makes a deal with SH’s group and it’s actually Yuta who took over coming to exact revenge on SH. Things happened but I kinda forget the details and now SH has come to realize the truth about the past and about his feelings. Yuta is still in the same position probably withholding his trust because of what he went thru. Sorry it’s not the best summary lol

Im so confused can someone summarize the whole plot for me please??