Responses
Thats what i thought too. That he probably went back to time.
It would make sence since he was able to regonize that assassin in the train before!
beta
Possible Spoiler but not really
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Luca probably reincarnated and turn back time, when he was sick thats high likely the timr he got his memories of his future self that's why after recovering he started eating willingly despite the refusal of thoseone month the aunt beforehand