At first, Ichirou rejects the girl, Satou Ryouko, because her behavior reminds him of his embarrassing past, but he changes his mind after seeing her getting bullied.
Sentai Filmworks picked up the anime feature film Aura: Koga Maryuin’s Last War back in 2015 and brought it out with separate DVD and Blu-ray editions at the time.
Plot concept: Satou Ichirou once called himself ‘Maryuin Koga’ and behaved as if he were a hero in a fantasy world.
In order to bring Ryouko back to real life, Ichirou accepts her and his past and begins the final battle as Maryuin Koga.