@Hollow7F , Mirroring what
@stride said, according to WN the MC has absolutely no memories of his past self like their name, personality, family, or how they died.
He has a vague understanding of stuff like "the language people speak isn't Japanese or English" and other things like "everything looks medieval-ish" but his memories are very limited/blurry.
As for the MC's original gender its technically up on the air, but he does use 俺 (ore) to refer to himself so I'd place my bets on being male; although he could be one of those "Orekko" heroines i guess.