After finding himself in a new body in the world of his favorite dating sim, Fudou Niito dedicates himself to playing the role of Ellize, the fake saint, to perfection. He's dead set on defeating the witch and making sure his favorite heroine, Eterna, as well as the rest of the cast, get to enjoy a happy ending.

Unfortunately, just when he thinks he's finally found the perfect plan to do so, the royal families arrest him! Luckily for Niito, his previous life as a NEET means he doesn't mind lazing around in the comfort of his cell. Verner refuses to accept his beloved saint's arrest and rushes to the rescue! It won't be so easy, though! How will Niito sort out this new mess?!