I like the idea of this being a battle manga. Familiars being basically stands.
It's got an odd sense of worldbuilding so far. Not huge on the ecchi, but I probably wouldn't be three chapters in without it.
This dude has a great life. A sexy familiar who actually protects and cares for him. Sex with the boss. Double the salary of a 'white mage' and he should get even more when he goes up the ladder. I WANT IN!
@nightcore34 plus some magic that could do anti aging there might even be mortality there I'm willing to sacrifice some of my height or fat for that magic I want his job.