High School Prodigies Have It Easy Even in Another World!, Vol. 7 (manga) — Riku Misora

FREEDOM AND SECRETSUnder Tsukasa's brilliant leadership, the Yamato Resistance enacts its plan to wrest control of their nation from the Freyjagard Empire and the traitorous Princess Mayoi. The key to their plan is the artifact that is the source of Mayoi's mind-control magic, but will it really be as simple as destroying the object? And is returning to the old government truly the best thing for Yamato? Mayoi wasn't born hating her own people, after all. Something must have spurred the girl to turn against her homeland...