 If you liked
Zero no Tsukaima
|
 ...then you might like
Machine-Doll wa Kizutsukanai
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Very similar context: the MC is a master and a has a human familiar (accompanier) of other gender while others have monsters instead.
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Recommended by lightningfalcon
Not exactly similar, but the atmosphere is very similar. In either someone comes from another country or world that eventually ends up changing the routine of those people.
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Recommended by Luffy22194
-In both, there is a master/servant pair, though the roles are reversed
-In both, the other familiars are creatures not humans (/dolls)
-In both, there is a mystery villain and betrayal of people you know
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Recommended by thelectricow