I might have an unpopular take on this story but hear me out. Nokyoung was just as bad as the blue hair girl who trying to spread dating rumour in his past life, and being manipulated isnt a good excuse. But somehow he changed completely right after he get sent back into the past. I mean changes is inevitable but it was done pretty awkwardly.
Also, he should at least be informed about what really happened when the sex tapes of hyunjae and hanil got leaked bcs of hyunjae, not kept from the truth so he could judge the situation himself.
But other than that, this is a decent story and is to my liking so far.