This show is very much a life drama about a family of young lords and the woman that go on to shape who they are as men. Every single female character is a whole human, with her own feelings, emotions, ambitions, thoughts, and plans. They aren't all the same nor do they want to be. They all help and uplift each other throughout the story. There are both male and female villains, some that get redemption and some that don't. There are gray characters that float between. Each personal feels like an actual person. The responses to conflict and misunderstandings feel real and earned. The love stories sprinkled in are strong and healthy depictions of what a balanced and mutually respectful relationship should look like. They also show you the bad side of toxic and one-sided relationships, and how just because you got yourself into a bad place doesn't mean you can't also get yourself out. Everyone deserves respect from their spouse.
Just the sisterhood alone with all of the young lords' wives and concubines is worth the watch. Very progressive in their storytelling in a fictionalized country. When 7th's wife feels nervous and unsure about herself because she is slower to do things, every single one of the women around her validates her and complements her on her care and attention. When the 2nd Crown Lord shows his true colors the women band together to help their friend Hao Jia. His wife even plays one of the largest roles in getting Hao Jia and herself out of a horrible situation. And with that storyline Yin Zheng(6th) gets closer to his own mother after realizing she was struggling with a similar situation as Hao Jia was.
But the best relationship is that of the 6th Lord's wife(Yuan Ying-Jin State's Princess) and side wife(Li Wei- FL). There are like true sisters. The Jin Princess immediately takes Li Wei under her wing and trains her to become the lady of a royal household and partner to Yin Zheng(6th lord). Yuan Ying becomes like a sister to both Yin Zheng and Li Wei, and they all share a bond that could never be broken. She becomes one of their fiercest allies.
The understanding and refusal of Yuan Ying to cause any misunderstandings between Li Wei and Yin Zheng is peak supporting female character energy.
We have a simple girl who has the protentional and drive to make great change.
A warrior princesses trying to find her happiness.
A woman who doesn't want to follow in her mother's footsteps. And though she miscalculates finds her feet again.
A princesses who is smarter than all the men and knows it.
A group of women who band together against their trying husband, and protect and care for each other as they fight for there individual wants and needs.
A kind and quiet girl, who just would rather be left alone, if that's okay, who finds her other half.

I could go on and on, because the characters are all great fully fleshed out. But just know that it's worth the watch. Even though it's 40episodes there are enough smaller story arcs that start and end every few episodes that keeps the momentum of the story going. You will laugh, cry. and kick your feet from this slow-burn romantic life drama.

PS: We don't see him much, but I have a soft spot for the 9th little lord as his is just like his sisters-in-law...and that punch in ep40....bravo.