Trapped in a Dating Sim: The World of Otome Games is Tough for Mobs (Manga) Vol. 10

SECRET PLOTS AND PRISON TIME!
Leon, the side character turned protagonist, has been arrested! For his own safety, so says Mylene. But perhaps nobody will be safe after Frampton and Hertrude make a secret agreement—the Principality will invade the kingdom and in exchange be granted valuable land! With our hero under lock and key, who can stop this plot, and the plot of the otome game Leon is striving to win, from coming to fruition?!
Series Overview: 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!