The Heroine and the Villainess are Best Friends

Mina and Rae are best friends who got reincarnated into the novel. Yes, they both got thrown into the novel 'My Lovely Songbird'- a clichè RoFan which managed to become popular among young ladies. Rae, together with Mina, were walking their way home when they were unexpectedly struck by a speeding truck. Who would've thought that that truck is the famous isekai god, which brought thousands of innocent and vengeful souls into fictional worlds!