 If you liked
Isekai Meikyuu de Harem wo
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 ...then you might like
Makenshi no Maken ni Yoru Maken no Tame no Harem Life
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Basically harem life in dungeon setting after getting isekaid. Both have their fair share of smut and good art for those scenes too
Both are sort of sex-based isekais. Both also involve master-servant-esque relationships. The MC is indeed one horny mf in both. And, although the plot is more or less unimportant, both involve dungeon/labyrinth clearing as the plot. Trust me, although Isekai Meikyuu has the better art IMO, they are good quick ecchi mangas that will satisfy.