Woman repeatedly dies and resurrected on a specific day, waking up with a coin in her hand. She keeps reliving the same story over and over again, making her go crazy and she decided to become a murderer. I also remember that she had a butler or something that would cover up her tracks.
Oh i think its this https://www.mangago.zone/read-manga/resetting_lady/
If I remember correctly it is a full color manga. It was about a blonde girl who was part of the duke family. She was evil and did all sorts of nasty stuff and she fell in love with the emperor, her husband. He fell in love with the girl with black hair. She got jealous and died? She went back in time or something and she wanted to be nice this time. So she enrolled in the school and pretended to be a commoner. She made some friends. Then the emperor was like who is my fiancé and went in disguise. She was in the middle of painting and when she saw him, she cried. Eventually she fell in love with him thinking that he was a commoner. Later she had to marry the king as he chose her. …..skip a lot of things. Ohh there was a guy who was a dragon who fell in love with her and tried to kidnapped her. The king got her back.Things happen and they had kids at the end.
Sigh. I only like the first chapter. I absolutely hated the last chapter. Thats bullshit, his way of doing things makes me want to cough up blood. But the art is nice. (╯°Д °)╯╧╧