great story

noticed a small plot hole (or maybe im just dum): how does yusung not remember things that he has done in his curent timeline? he said that he doesnt remember kissing taewon when he was drunk cus he's been regressing?? huh? how did his actions change before the point in time that he regressed?

time travel stories will always have a plot hole tho cus its kinda a paradox but just smth i noticed