Real Heir Returns, Family Regrets

World's number one assassin Tang Qingmo accidentally transmigrates into the book as the true heir of the Tang family, neglected by his father and sister. Confronting his scheming adopted son, biased parents, and three sisters who constantly defend the adopted son, he resolves to sever all ties and destroy the Tang family. When the Tang family finally regrets and cries in tears, Tang Qingmo only smiles coldly, showing his satisfaction.