The culprit is probably this Seungho guy who called Hyung on the phone. He was probably in love with him and was jealous of his affection towards Hyunwoo. He also was probably jealous of him as an actor too. Hyung probably learned about it afterwards but didn’t want to give him away that’s why he doesn’t to Hyunwoo to remember about the incident. Well that’s my guess because it would be too simple if it was Hyung and nothing surprising.
The culprit is probably this Seungho guy who called Hyung on the phone. He was probably in love with him and was jealous of his affection towards Hyunwoo. He also was probably jealous of him as an actor too. Hyung probably learned about it afterwards but didn’t want to give him away that’s why he doesn’t to Hyunwoo to remember about the incident.
Well that’s my guess because it would be too simple if it was Hyung and nothing surprising.