Thanks to some unfortunate gameplay, a young man named Leon has been reborn into the world of an alternate universe otome game. Facing an absurd scenario where males are no better than livestock who serve at the whim of women, Leon only has one weapon–his knowledge of the dating sim genre–to survive the challenges he faces and inspire a revolt against the system!

Carla, a noble classmate, has come at Olivia's invitation to ask for Leon's aid routing sky pirates. The request should be no problem for Leon's incredible power and almighty airship, but there's something fishy about Carla's plea. Can Leon survive a war against a skyfaring navy of ruthless pirates long enough to overthrow the very systems of the world? Can a side character become the most important hero of all?

Leon doesn't want a leading role. Too bad for him. Between his new promotion and the attention of protagonist Livia and villainess Angie, no one will leave him alone--least of all the prince and his lordly gang. As Leon struggles for independence, tension grows with his allies. But soon, they'll have to band together to face the greatest danger imaginable, one that threatens to destabilize the game itself.

Office worker Leon is reincarnated into a dating sim video game, where women reign supreme and only beautiful men have a seat at the table. But Leon has a secret weapon: he remembers everything from his past life, which includes a complete playthrough of the very game in which he is now trapped. Can Leon spark a revolution to change this new world order?

Deadly Duel Marie has been flaunting her pursuit of Julius despite his engagement, and Angelica can't take it anymore. She throws down her white glove and demands a duel! Unfortunately, the gesture riles up old antagonisms from Julius and his posse and Angelica's own lackeys desert her. Unable to bear seeing Angelica surrounded by enemies, Leon accepts a five-on-one fight against his social betters on her behalf. Luckily he has an ally—the almighty airship Luxion!

The Salamander Kampfgruppe has finally come off the front lines and is headed back west for much-needed R & R. The troops are more than ready to enjoy some peace and quiet after many long days flying missions on the eastern front. What they aren’t ready for is how unfamiliar it feels not to be surrounded by whizzing bullets and exploding artillery shells. For Tanya, though, this long-awaited return to the rear brings more disturbing realizations than respite. This vacation may be far more eventful than it has any right to be...

Against his wishes, Leon keeps getting pulled deeper and deeper into these otome game plotlines. Somehow, he's ended up with the Guardian Crest of the Sacred Tree, which is supposed to manifest on the hand of the chosen love interest. But Noelle, the new protagonist, couldn't possibly feel such things for him, right? He's going to have to figure it out fast, or Noelle might be swept away by men with far darker intentions for the Alzer Republic...and for Noelle herself.