SPOILERS!!
From what I remember: Minjae (SEME) was introduced to Andy (EX) by a former teammate. They remained friends for 3 years until they started dating (Andy pursued Minjae). But it was revealed that Andy and the former teammate had been friends with benefits since long before. Minjae learned this when he caught them hooking up. I don’t know if this is 100%, but Andy and the former teammate may have continued being friends with benefits while Andy dating Minjae. Which may explain the frame of him walking in on them. I don’t think the teammate knew either because he claimed Minjae shouldn’t have butted into their very messy relationship. Throughout the recent parts of the series Andy is seen following Minjae and even Heechan (is caught in front of Heechan’s business) because he “wonders what Minjae has been up to” and that “he’s still in love with him”. Minjae isn’t interested in dating him again and tends to ignore him. Andy came all the way from Canada just to stalk him. Andy apologizes and hopes that Minjae can forgive him all the time, and give him a peace of mind. But Minjae tells Andy that he ruined everything the moment Andy did what he did. Minjae reminds him that he told Andy that he never wanted to see him again. “Hundreds of apologies ?? More like hundreds of times you ignored my wishes.” Andy only did it to satisfy his own ego by denying Minjae hundreds of opportunities to forget about his bad memories that he had been trying to move on from. Andy isn’t a bad guy on paper but you can’t help but hate him yourself too. He also secretly recorded himself and Minjae hooking up without Minjae knowing, and kept the video to himself. I think Minjae definitely falls for heechan first, but Heechan follows suit soon after, hope this helps
I think he fell for heechan when they're still in HS lol. He didn't forget about him. Just wishing though
Why does the seme hate the ex so much? Haven't read this fully just skimmed through it.... Alsoo who falls forst amongst them?