Oh this one fell hard.
The initial story and characters was really great. I would gladly give a 8/10 for the first half of the anime. The MC having a Miss Perfect facade cause she wants to marry a rich guy in the future is really funny, and getting to see the story from her POV got me very hooked. On top of that, the "main" ship with her big sister schwester kinda thing is really cute. I'm a sucker for both cute girls and enemies to lovers and the characters development of Hime and Mitsuki was a really well paced mix of drama and sweetness.
So how could that promiscuous beginning fall so hard? Let me be straight; MMISCOMMUNICATION Don't get me wrong, the first half already had plenty of it, but it had enough comedy and interest for it to be entertaining. Therefore, the second half of the anime really lacked the comedic and sweet romance effect that was so balanced in the debut. To make things worst, the entire plot gets around one annoying aa character and take easily all the screentime just for it to be painfully slow and forced. Istg I didn't even recognize the anime at this point because of how frustrating watching it was for me.
Here's my advice and overall review; watch it until it gets bad and then read fanfiction to cope with the pain and fall down of this anime 🙏