The Villain Boss and I Are Both Reborn

My friend comes from a mysterious family and is the greatest martial artist alive. My master is an immortal from the Upper Realm. My demonic beast is the last Bi Fang in existence, and even the Demon King must submit to it. But my own family is wretched, my parents are nowhere to be found, and even the first person I fell for doesn't love me. Tsk, it's fine. I still have my disciple. But my disciple develops inner demons and falls into the Demon Realm... The young man is not very old, yet his eyes are deep and shadowed, like those of an old man who has weathered countless twists and turns. He looks at the woman on the bed and slowly lowers his head. “Master, this time, you have to stay with me forever.” I offer myself to the demon, and this is so hard! (Two people reborn, both secretly in love.)