aaa wait im confused so was there a small time skip? like from when they were eating their...

the black background is a flashback

yeahhh im just confused bc the part right before it turned black it was like the same scene,, but with a white background? idk im guessing im interpretting it right and it's just kinda an awkward narrative choice maybe?

Yeah it's confusing. But it basically goes like this.
Seungho drinks alone in his room, remembers what NK said during their meal earlier the same day (flashback), flips a table in the present out of anger, goes to NK's room and ask him to strip.

ohhh i see! tyty