Lol i feel like luka is a transmigrator or a reincarnator himself. Kinda cute ( ꈍᴗꈍ)

spoiler!!!
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someone said that luka was reincarnated for the second time so that's why he can read and has adult like attitude

Ur on to something.. I suggest reading the novel spoilers because ur absolutely right(⊙…⊙ )

I mean rebirth not reincarnated