After Having Their Lives Taken Away by The Whole Family, They Regretted It

Chu Li, a transmigrator who became the protagonist of the novel Legend of Martial Arts, was born into the Chu family, a prestigious Martial God lineage in the Great Xia kingdom. Although he possessed the family's hereditary Martial God Bone, his naturally frail constitution and the death of his mother left him vulnerable. For six years, his life was upended by the arrival of Chu Ming, an adopted son who received all the family's affection, resources, and privileges. Chu Li was neglected, starved of cultivation materials, and subjected to emotional abuse by his father, Chu Lingtian, and his three sisters, who viewed his longing for attention as jealousy and malice. Despite these hardships, Chu Li reached the Postnatal Realm through his own talent and determination, winning a competition for the Martial God Bone against Chu Ming. However, his family refused to honor the result, declaring the bone belonged to Chu Ming due to his "pure heart," and cursed Chu Li to die within five years without it. Heartbroken and realizing the family bond was an illusion, Chu Li severed all ties with the Chu family and left his home.

As Chu Li departed, the Martial God System, which had been waiting to bind to him, activated. The system was shocked to find that Chu Li no longer possessed the Martial God Bone, a prerequisite for its optimal function. However, upon learning of Chu Li's decision to spend his remaining five years slaying demons and protecting the common people rather than living in resentment, the system evolved into the Peerless Martial God System. It committed to helping Chu Li reach the peak of martial arts despite his shortened lifespan. Meanwhile, back at the Chu family, his second sister Chu Ruyan began to experience sudden flashes of memory and a deep sense of regret upon discovering the squalid conditions of Chu Li's former residence and learning that he had received no cultivation resources for years. Realizing she had neglected her true brother for an adopted outsider, she rushed to find him, but he had already disappeared.

Chu Li traveled to the outskirts of the imperial capital, where he encountered a group of pig demons disguised as innkeepers at the White Poplar Inn, who were kidnapping and eating travelers. He also crossed paths with Nangong Shi, a talented martial artist from the Nangong family and his nominal fiancée. Nangong Shi had previously refused the marriage alliance after hearing rumors that Chu Li was a vile, ostracized young master. She had come to the inn to hunt the demons to gain points for the Shengwu Academy, hoping to prove her superiority over him. During the battle, the lead pig demon, who had broken through to the Postnatal Realm, overwhelmed Nangong Shi and her companions. Chu Li intervened, killing the demon with a single strike of the Chu family's Demon-Repelling Sword Technique. After the battle, Chu Li collapsed from the exertion due to his weak constitution. Nangong Shi, discovering his identity and learning the truth about his exile and the Chu family's cruelty, felt a surge of guilt and anger toward her own family's treatment of him.

Upon waking, Chu Li explained his decision to leave the Chu family and his resolve to fight demons for the rest of his life. Moved by his noble character and compassion, Nangong Shi offered him refuge at the Nangong family, but Chu Li declined, preferring to walk his own path. He accepted a gift from Nangong Shi and continued his journey, determined to live freely and meaningfully in his final years. The story follows Chu Li as he embarks on a new life as a demon slayer, supported by the Peerless Martial God System, while his former family begins to regret their actions and the heroine Nangong Shi becomes an ally in his quest.