Fairy, you call this repaying a debt of gratitude?

Shen Wei's life took a drastic turn when he transmigrated to another world, only to face the brutal slaughter of his entire family due to his possession of an evil dragon. In his darkest hour, a fairy intervened, saving his life and inspiring a deep sense of gratitude within him. Before departing, the fairy left Shen Wei with a few cultivation manuals, and he assumed their paths would never cross again. However, their unexpected reunion in a dilapidated ancient temple revealed a changed fairy, now disheveled and far removed from her formerly aloof demeanor. With a decade having passed, Shen Wei's feelings had also shifted, replacing youthful romance with a sense of obligation to repay the fairy's kindness. His intention was to protect her temporarily, settle his debt, and then part ways, erasing each other from their memories. But fate had other plans, as a sudden and ominous threat emerged in the form of a cold blade pressed against his neck, accompanied by a haunting warning: his single act of salvation was not enough, and his repayment of the fairy's debt was only just beginning.