Ahh i like this manga! Finally a MC that wasnt reincarnated or transmigrated to ridiculous novel/game/movie world with ridiculous plot as well. At least the reason why the duke treats her like that makes sense. He’s a bad & ambitious man who use her as his tools. He might do the same with his real daughter which might be why she commited suicide.
Finally she hit a jackpot with a name. She’s so lucky to get it right. She has a terrible naming sense. Lune looks so shocked about Ellie knows his gender. I also wonder how did she know?? When she did check it?