Luna Starr

It's been awhile since I last asked for help to find a manga and this one has been on my mind for 3 days. And I can't find the right key words to look up and find it.
I'll try to describe it best I can...

A girl with glasses(I think use to be or is a Nobel) is made to marry a man every one calls a demon lord because she wants to save her familys home. The girl is called something like the bringer of death because her last fiance was killed at the alter. She loves to read and eat ponious plants. She also loves horror and loved the lords house despite everyone calling it creepy.
The Demon lord she is marrying is not an actual demon. He is called that because his father would kill girls in hopes it would make the roses grow better. Also the lord is pretty cold to most people.
The lord has a maid who loves him and told the glasses girl that she was his mistress and was shocked when the girl didnt care. The maid is always trying to get her in trouble and get rid of her.
There is a crazy assian who starts off trying to kill who the girl was married to, but eventually changes to their side and serves them. His favorite hobby is interubting the lord when he wants alone time with the main girl.



I hope someone knows which manga I'm talking about, im bad at describing things.
Please help and thank you.

Does anyone have a list where they saved long mangas. I'm in the mood to read something that will take me awhile to finish. I don't care about the genre.

Thank you so much in advance! !! (^-^)