Day and Night, the Sickly Princess Marries Her Grand Tutor!

Synopsis:

[Reborn yandere heroine VS transmigrated-into-a-book supporting female character, both leads are pure] Only after Mu Ci died once did she discover that the woman who had transmigrated from another world had switched their fated roles, taken her place as the heroine, and stolen her fiance, her guard, and her closest friend.

When her mother was in danger, she chose the transmigrated woman: "Save Qingqing!" Her father doted on the woman: "Qingqing is my lucky star!" Her younger brother said, "Qingqing is the only older sister I have!"

While Mu Qingqing basked in everyone's love, Mu Ci was imprisoned in an enemy camp, where she was tortured to death.

After being reborn, Mu Ci no longer needed anyone's love. She only wanted them all dead...

[The male lead gently guides her. The righteous, aloof beauty is pulled from her pedestal.] It wasn't all her fault. How could any of it be her fault? They can all die with her!

[Not a conventional wish-fulfillment story. The heroine is no paragon of virtue and is far from ordinary. Readers who dislike saintly heroines, moralizing characters, or strict historical accuracy should stay away.]