 If you liked
Death March kara Hajimaru Isekai Kyousoukyoku
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 ...then you might like
Kami-tachi ni Hirowareta Otoko
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both have men working for horrible companies isekai to a new world
both men become younger in their new world one goes for 29 to 15 and the other 30's to 8 '
both are overpowered and live as they want one decide to go sightseeing in his new world and the other researching slimes and magic