I Can Kill Immortals with One Sword

Ye Wushuang, the number one swordsman in the immortal world, was plotted against by the Immortal Palace during his tribulation, and his natal sword was broken into two pieces. He fell into the Demon Realm and became the new Lord of the Demon Realm five hundred years later. The other part fell into the human world and evolved into a dangerous peak that no one can climb to the top. And his remaining sword soul was attached to an orange cat, and it lived in stupidity and chaos for five hundred years. Until he was picked up and brought home by a useless girl. "You will be called Daju from now on!" The girl fed him, bathed him, and held him to sleep. Seven years later, the girl was bullied and her life hung on a thread. Among the crowd, a fat orange cat lazily walked out. It yawned, and then— A sword cuts the sky in pieces. "Touch her? Have you asked me if I have the sword?" This is a story about protection and counterattack. Not sweet, no money required.