Responses
[spoiler]
[proceed with caution]
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read the novel and his ex fiance somewhat time-travelled too? like when the FL returned to a previous point in time, so did her ex-fiance. so he was like getting all these deja vu vibes and it was always ALWAYS correct. but he hasnt figured it out yet that he has memories from the past/time traveled. thats why he was shocked the FL was alive because FL was supposed to be missing for a long time already

I have 2 theories
1. his the assasin that tried to kill the 13th prince and Charlize
2. he remember his past life
But then again the circumsyances is not that of a match. My first theory wont be resonable since the facial exprrssion is not matched, my second theory is not match with the time period