Just played the demo and I loved the art, characters, and the setup of the story!! I also wanted to say that I'm really impressed with how Riilai seems like a sexually empowered woman as t isn't all that common in otome games. Most otome heroines tend to be more modest (which is perfectly fine in itself), and the sexual characters are usually villains. It's pretty refreshing to see another perspective :)
Heeey! I'm glad you like the concept. And yes, the novel features 18+ and mature story so we decided to show non standard teen relations. Main characters got some sexual experience and they won't collapse after seeing naked body. Also the flirt and overall interactions are far from teenagers stories. Main cast age between 22-30 years old. They are experts and got a good jobs and ready for some serious relations.
I hope this will be good to experience a bit different story and you'll enjoy it.