Isekai Cheat Magician - Season 1 Episode 9 Commencement of Battle
Overview: Word reaches the Royal Capital that the King's younger brother has finally reading his troops for an attack. As the battle draws closer minute by minute, Taichi tries to convince Rin to stay away from the battlefield, yet she displays her strong resolution to fight alongside him. After learning of Rin's resolve he vows to himself that he will protect her.