I Changed My Gender and Became a Respected Person by Turning Against Armor.

Xiao He died suddenly and was reborn as Xiao Mu, a girl in the supernatural world. Her immortal physique allowed her to hide for eighteen years. During the awakening ceremony, she thought her power would be immortality, but she unexpectedly awakened a conceptual power - counter-injury. The instructor rated her as only C-level, and she was instantly reduced to a laughing stock. The family's attitude took a turn for the worse, and her parents even wanted to sever ties. Just because of her delicate appearance, she was retained as a marriage pawn, targeting the young patriarch of the Zhuge clan, the first family in Daxia. As everyone knows, her ability to counter damage is quietly evolving...