Total Recommendations: 1
If you liked
Machine-Doll wa Kizutsukanai
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...then you might like
Seikoku no Dragonar
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Both of them involve an MC with "sub par" abilities assisted by a cute companion who happens to be incredibly strong. It is a Dragon in Seikoku no Dragonar and a Golem/Familiar/Doll in Unbreakable Machine Doll. In addition, the setting creates a very similar feel between the two. Unbreakable Machine Doll has a stronger harem element, but that doesn't mean it's a harem, while Seikoku no Dragonar seems to have more service in my opinion. If you like one, I'm pretty sure you'll like the other.