
I think Jade in the previous timeline somehow turned back time to when they were 10 years old. That's my guess.
I'm reading "It's time to change the genre" and "The Princess Imprints the Traitor", which share similar themes. The second one is much more similar, in that the love interest is the one whoe reverses time but he is not the main/POV character.
They better show him with a twisted expression or else imma simpppppp