Magic in This Other World Is Too Far Behind! Volume 10 (Light Novel)

While Suimei has temporarily returned to his own world, Reiji's party heads to Astel to report the recent developments to the king. However, a demon army has sprung from seemingly nowhere, putting Reiji and his group in the middle of a defensive siege battle!Reiji sets forth, Sacrament in hand, but even his power can't turn the tides. Will Reiji and his party be able to hold the line long enough, or will Suimei return to a broken world?