So this requires someone to have an interest in actually watching a k-drama and then dealing with the goddamn MESS that is this man, but Ahn desperately misses his guardian/older brother Kang Sungmo. Without going into too much detail and spoiling everything, Sungmo is about on par with Ahn in terms of being a main character in the show, and there is so much to work with there. So much. SO MUCH. I CANNOT UNDERSTATE HOW INTERESTING AND DIFFICULT AND AMAZING IT WOULD BE IF WE HAD SUNGMO. Especially depending on when Sungmo would be brought in from in canon. He is also the only person in the world Ahn hasn't been able to read.

Anyway please don't google him too much, you'll be spoiled hardcore if you do. Just look at this uptight asshole and how much Ahn loves him: