Happy Ending just as God Says

The dull office worker Mirai suddenly finds herself reincarnated into the world of her favorite web novel, When the Golden Mirror Shines!\r\n\r\nNow living as the heroine, Luna, she rejoices at the chance to achieve a happy ending with her beloved hero, Valei. Since she knows the entire storyline, everything should be smooth sailing... or so she thought—until the novel’s author, whom Mirai practically worshipped as a god in the real world, starts rewriting the plot?!\r\n\r\nWith one unexpected crisis after another caused by the author’s whims, can Mirai—now Luna—still reach her happily-ever-after with Vallei?!