Worried

Spoilers:

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Initially yes but nothing serious or overdramatic like the concubine story of the manga Yume no Shizuku.

My point the title is sort of bait material, it does not focus on the matters of the concubines alone, there's a bigger plot. And a greater danger/antagonist mc has to face and solve before she can focus on the harem and falling in love. Tho ofc the guys are waiting on her.... some of them aren't even there for her love when they choose to be her concubines but just want connection and work together to catch the culprits etc. So yeah she does work with them. And it definitely has reverse harem vibes to it since mostly the romance interaction are innuendo and mc hasn't fallen deeply in love with any of them due to other stuff she has to solve so the kingdom is safe.
But ofc, first days are difficult and there's some hostility among the men.

I read the novel so no, the concubines in here aren't that into serious fighting and dramatic. Actually they are hilarious sometimes its like MC raising a bunch of kids than having a harem

There was some hostility among them at first lol.
（￣へ￣）
Did you miss that?
Like the incident with the water with Gesta and Kline, it was a third party that did it but neither of the two tried to explain the situation. Since they were both hoping to showcase the other was bad.
Gesta didn't said it was his attendant but played along the victim thus by being passive he makes K line look the desperate and the one that leaves the bad image.
Meanwhile Kline despite seeing it was the attendant kept accusing Gesta to be the culprit.
In terms of pointing fingers and creating facade to attract the pity of the emperor while staging to make the others a bad person what they did IS PRETTY COMMON concubine antics.

I know that part but Kline & Gesta was both sulking about it that's why compared to other reverse harem, I'd say that was childish. I've read other reverse harem than really resorted to plotting of killing each other and in here, none of them actually did try to assassinate one another. Even the soup that can cause erectile dysfunction was rather solve hilarious because of the means of method of healing. So i'd say out of all the concubine antics, the water incident was pretty light and it wasn't even the concubines who did it.