The FL is red hair and she got married to (black haired?) ML who hated her because of her family. FL wouldn’t turn out broken if ML didn’t emotionally abuse her or ignore the abuse the staff did to her. Anyways she then fell in love with this silver long haired knight in the household. I can’t remember if the ml is a duke or something but he is a noble. Ml knew about fl and knight’s relationship but ignored it mostly, but then when there was war, he sent the knight to battle and he died. Fl was devastated and became revengeful. Fl decided to act that she loves him so when he actually fell inlove, she will dispose him just like he did to knight. There was also a scene where Ml brought the black haired daughter of his master to the household because he made a promise to his master/ sword teacher he would take care of her and ml is also guilty cuz he sacrificed himself to protect ml when he was younger. From what I remember, fl killed the daughter thinking she was the lover of ml and justified it since ml killed her lover it is only fair, she kill his. Later on fl ran away with her maid and they got discovered by ml when he became obsessed with her at some point. Fl became more suicidal because she can’t handle the deaths of her parents, lover, the daughter which she actually liked and wished they may have been friends if circumstances were different. I can’t remember what happened afterwards but it was a slow burn light novel that became manga
The FL is red hair and she got married to (black haired?) ML who hated her because of her family. FL wouldn’t turn out broken if ML didn’t emotionally abuse her or ignore the abuse the staff did to her. Anyways she then fell in love with this silver long haired knight in the household. I can’t remember if the ml is a duke or something but he is a noble. Ml knew about fl and knight’s relationship but ignored it mostly, but then when there was war, he sent the knight to battle and he died. Fl was devastated and became revengeful. Fl decided to act that she loves him so when he actually fell inlove, she will dispose him just like he did to knight. There was also a scene where Ml brought the black haired daughter of his master to the household because he made a promise to his master/ sword teacher he would take care of her and ml is also guilty cuz he sacrificed himself to protect ml when he was younger. From what I remember, fl killed the daughter thinking she was the lover of ml and justified it since ml killed her lover it is only fair, she kill his. Later on fl ran away with her maid and they got discovered by ml when he became obsessed with her at some point. Fl became more suicidal because she can’t handle the deaths of her parents, lover, the daughter which she actually liked and wished they may have been friends if circumstances were different. I can’t remember what happened afterwards but it was a slow burn light novel that became manga