Keiki's manga / #strong female lead(7)

Toxic. The bottom is supposed to be a smart person but he's just stupid and bad at decision making. I'm dropping this as i can't take it anymore

Possesed body of the villainess in a novel, was kicked out of the family bec she was useless. Went to open up a stationary store in front of the academy left to her by her dead mother. Awakened the sword and the hero inside it. Heroin in the novel who is her half sister and is the lover of MCs fiancee, she and the fiancee were the bad guys along with her family. Stationary store. Cute stuff. Enchanted items. Happy children. Demons sealed inside the sword turned servants sort of. MC has blood curse or something but seems like there's more to it and the fiancee knows abt it that's why he didn't want to break up the engagement. Ch 84 waiting for better ttanslation Pope supporting Sheria is the villain

3 ex-husbands. power to travel through time and space through her paintings. Went back to past to get revenge on family, kaiser, kaiserin etc. longing for her past child and baby.