Responses
I'm pretty sure that his ex won't be shown anymore. I think the author inserted him in the story just to explain the reason of alex's bad behavior and why he hated love. It would make no sense to make him appear again after all these years without a reason. Also because Alex wouldn't even consider him, he would be useless now for the plot. If you want to worry about something I'd think more of that waiter in chapter 69 who bullied dg in high school, but at this point I don't think anything relevant will happen anymore because according to the author's indications the manhwa should have about 80 chapters
One thing settled for Dong gyun side. Now, only jiwon sunbae's side of story left hanging. I have a feeling that his ex will be coming back or showing up soon. Just the calm before the real storm... Just my prediction. Afterall, they are so adorable after they've officially dating!