They're still together, i assumed. This side story occurs BETWEEN 66 and 67. On chapter 67 you can see dohyun's phone on his way to meeting Sungho and it's 8:30 on December 31st. And in this chapter you can see their phone (both of them) and it's christmas 9:48 December 25th. So, this happened BEFORE THEY MET on CH 67.
I am not sure tho. I had a feeling that this chapter happened after the incident, and they lived separately for the meantime. And the continuation is on CH 67 when they got back together.
They're still together, i assumed. This side story occurs BETWEEN 66 and 67. On chapter 67 you can see dohyun's phone on his way to meeting Sungho and it's 8:30 on December 31st. And in this chapter you can see their phone (both of them) and it's christmas 9:48 December 25th. So, this happened BEFORE THEY MET on CH 67.