Ruche Riddle noticed that the world she was living in was strikingly similar to that of the R18 otome game that she played in her previous life, "Labyrinth Waltz - The Flower Sinking into the Lascivious Cage." Moreover, she was the heroine's best friend. And if she entered a bad route, she would end meeting the same ridiculous fate as the heroine. To steer her friend and herself away from danger, she started working hard without any support. But instead of maneuvering the targets into the most preferable route, her body undergoes an unexpected change?!