We have an unwilling protagonist, Terakomari Gandesblood, who is put in position of leading one of her country's armies as its commander, despite being a teenager shut-in vampire who refuses to drink blood.
Hilarity ensues as she must pretend to be incredibly competent and powerful in order to stay in control of her soldiers. In addition she has been supplied with a beautiful and deadly maid who helps enable this deception, while also fawning over Terakomari and attempting salaciously to entice her.
That last part is entirely yuri-bait (promising female on female intimacy without delivering it) and played off as a running joke, there is no yuri at all and while there is some fanservice and a tiny bit of ecchi, it's mostly tasteful or downplayed and used for emphasis.
I make a note of it because some people go into these shows expecting something specific.
It's a chuunibyou show because it's not meant to be seriously, but still wants to impart some drama and epic moments despite there not being the weight behind such a premise, meaning there's no story long establishment of antagonists or a deep character arc ala Guts from Berserk, to drive her on. It's all in-the-moment tomfoolery.
It's meant to be somewhat superficial entertainment with pretty girls in cool outfits, using high fantasy magic in spectacular scenes of devastation. It accomplishes what it sets out to do fairly well I think.
There's a fairly large amount of tropes, but despite having seen it all before I don't feel like they're too heavy handed with them. There are the occasional 'villain exposition' scenes, but that's the worst of it I think.
