Responses
I agree so I think it wasn't such a great idea to explore these side characters in the side stories and leave all these loose threads unless you plan to make a sequel to it. What's the point if you're not doing it? It's not like we're dealing with such a grandiose plot where an open ending seems the most fitting choice.
I liked the ending, I think it was logical that two of them didn't end up together however I feel that it lacked many things to take into account, such as dohyeok's character and redemption arc as well as siwoo's character. I felt like I needed more of a growth of both characters, instead of going in circles with dohyeok and siwoo relationship.