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

With the successful establishment of the Elm Republic, the Freyjagard Empire is engulfed in civil war, and the Yamato Empire finds itself embroiled in the Resistance's battle. Now it's up to Tsukasa, Aoi, and Ringo to lead the charge using their resourcefulness, prowess in combat, and technological mastery!