Responses

I think the "flashback" was Sungho transposing the face of current Dohyun onto the face of young Dohyun when he called out to him in the classroom after they first met. The pose and dialogue is the same from the first chapter of this season.

I guess it's a twisted memory of Sungho..
SPOILER
In new chapter there was one flashback with Dohyun who has covered his face in blood, i wonder if sungho was already crazy when he was kid and did sth to him? or it was from moment when he got that scar? I thought scar is rather from his adulthood.
Anyway, didnt happen much in latest chapter, but damn it was intense. When sungho kissed him on forehead he looked really crazy.