Kono Mama da to Shinisou na no de, Akuyaku Reijou wa Utahime ni Naru Koto ni Shita

Rio, who suffered from a rare illness, lost her hearing and eventually her life. When she regained consciousness, she found herself in the world of an RPG game she used to play, The Sword of Carola! Reborn as the villainess Chloe, she faced a series of misfortunes, including having her engagement annulled and being exiled from the kingdom. However, in the exiled land of Machina Kingdom, she met Mark, a blacksmith. Through their encounter, Chloe discovered she could use healing magic. She resolved: "If my singing can heal someone’s wounds… This time, I want to sing and bring happiness to those around me." Now, Chloe aims to avoid her death flags while using her healing magic and the power of song to achieve a happy ending!

Original Webtoon https://mechacomic.jp/books/191647