In the otome game "Revolution," a corporate slave OL named Rei Oohashi is reincarnated as the heroine Rei Taylor. However, her favorite isn't one of the prince targets, but rather the villainess Claire Francois! After the commoner movement led to the exile of Laine, Claire has been feeling down, and Rei wants to cheer her up. One day, Claire's beloved older sister figure, the princess of a neighboring country, Manaria Suus, transfers to the Royal Academy. With the emergence of her biggest rival, what actions will Rei take...? A love comedy fantasy focused on her favorite, Volume 5!