The Side Character A Cultivates Immortality

Li Yin had lived a smooth, happy life for decades. Between cultivation, teasing her master, flirting with her senior brother, and getting along with her fellow disciples, she had a wonderful time. Then the tribulation of her Golden Core struck, and her memories came rushing back. She discovered... she'd transmigrated into a book! And it was an unfinished book! Ha! She was a disposable character, destined to blow up her Golden Core to give the heroine a chance to live. She herself would die, never to enter the cycle of reincarnation. Li Yin: (╥╯^╰╥) Thinking of her tragic ending, where someone would secretly murder her, she angrily crushed a huge rock to dust. What a short temper! Here's what she had to say! Whether it was a deadly trial or the mastermind behind it, she'd face them all, one by one. She would never let her path to immortality come to a premature end. Thinking this, she turned and scampered behind her senior brother. I can handle this, so don't move. When I can't handle it anymore, then you can step in! Male lead's blurb: Ning Che never understood how a peerless genius like him had become a nanny, cleaning up after his junior sister and dealing with the messes she left behind. He followed her around, on edge every day. Even so, he had to endure the combined blows of his master and junior sister, taking flak from both sides. What chief disciple had it as rough as he did? But whenever he thought of that short-tempered girl with a soft heart, he was happy to do it. He was willing to join hands with her, ascend the Great Dao together, and protect the peace of the world. Cast off false virtue, preserve your true self, and stay true to your original aspiration. Only by remaining yourself can you attain the Great Dao. P.S. The heroine won't fight with the original heroine. The two have a deep sisterly bond. Theme: Stay true to your original aspiration, and you will reach your destination