Everyone in My Sect Is a Music Cultivation Master, Except I Sing Off-Key

[Music cultivation + transmigrate into a book + ensemble cast + adored by all + no romance + System] In one sentence: I became humanity's savior by singing off-key. Yu Yin transmigrates into a melodramatic tragedy and becomes the tragic heroine's cousin. She thought that, as someone who had transmigrated into a book, all she had to do was follow the System's missions, stay alive, and lie low until the ending. Who could have guessed things would go disastrously wrong from the start? The moment she opens her eyes, she's imprisoned in the villains' stronghold. Luckily, the original story gives her a golden finger. Thanks to the power of her singing, despite being hopelessly off-key, she becomes a music cultivator. The kind whose singing makes everyone who hears it lose it. From that day on, a legend spreads through the cultivation world: “Did you hear? One of the peaks of the Miaoyin Sect was stripped bare overnight, as if a gale had swept through. I wonder which powerful cultivator in the sect was training?” Passerby A: “I bet it was their senior brother. He's so young, yet he's already reached the Nascent Soul stage. What enviable talent!” Passerby B: “It had to be their senior sister. Her flute and sword skills are incredible. She's achieved so much at such a young age.” A disciple in the know remains silent: “Could it possibly be... our new junior sister practicing her singing on the mountain?” * Though the Miaoyin Sect has always ranked last among the five great sects, it is filled with talent and should not be underestimated. The Miaoyin Sect's elder says with satisfaction: “Now we don't have to worry about the sect falling into decline over the next hundred years.” Little does he know that the girl he happened to take in along the way will lead the sect to soaring heights, all thanks to a voice that leaves men speechless and women in tears. Under her influence, the aloof senior brother learns to poison and murder, The dashing senior sister writes wildly popular fanfiction, And even the adorable junior brother learns to swindle and cheat under her guidance!