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! Now 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 thoughtuntil the novel's author, whom Mirai practically worshipped as a g** in the real world, starts rewriting the plot?! With one unexpected crisis after another caused by the author's whims, can Mirainow Lunastill reach her happily-ever-after with Vallei?!