Beyond the Boundary: I'll Be Here – Past

The battle is over, and they can go about their normal lives now... or so they thought. With no time to rejoice after miraculously saving Mirai from Beyond the Boundary, Mirai lost all her memories. Akihito, now a high school senior, starts to avoid Mirai thinking it’s for the better. Not aware of Akihito’s feelings, Mirai tries to get closer to Akihito. Then, someone who knows of Mirai appears in front of the two. With Akihito’s troubles in vain, Mirai once again sets forth on a battle that forces her to look within.

Two tiny, aquatic humanoids search for their missing father, a boy battles a lethal allergy to eggs, and an invisible salaryman tries to become a hero.

Tanjiro undergoes rigorous training with the Stone Hashira, Himejima, in his quest to become a Hashira. Meanwhile, Muzan continues to search for Nezuko and Ubuyashiki. A recap of Kimetsu no Yaiba episodes 55–56, with new footage and special end credits.

The film's story begins when Arata inadvertently touches "Hermes Apocrypha," Lilith's Grimoire. Suddenly, he is enveloped by a bright white light, and a girl appears before him. She calls herself Lilim, and treats both Arata and Lilith as her parents. At the same time she appears, something changes in the world. The forbidden Eternal Library awakens. In the Library is sealed the ultimate culmination of Alchemy, the White Demon Lord. The White Demon Lord plots to eliminate Arata and the Trinity Seven to usurp the position of Demon Lord. Bristling with untold power, the White Demon Lord attacks Arata, and triggers a desperate crisis where Arata and the Trinity Seven must save the world in this last battle.

Finally, the day of Mai's high school graduation has arrived. While Sakuta eagerly waits for his girlfriend, an elementary schooler who looks exactly like her appears before him. Suspicious, and for all the wrong reasons... Meanwhile, Sakuta and Kaede's father suddenly calls, saying that their mother wants to see her daughter. She was hospitalized because Kaede's condition had been too much for her to bear, so what could she possibly want now?

It is 300 years into the future. Earth's environment had been devastated by mankind's own foolish plans and humankind is beleaguered by the sentient forests which they have awoken. The world balance is tipped when a young boy named Agito stumbles across a machine that glowed in a strange blue hue inside a forbidden sanctuary.

Satou Ichirou once called himself 'Maryuuin Kouga' and behaved as if he were a hero in a fantasy world. His strange behavior caused his classmates to bully him and he left the school. At his new school, he tries to behave like a normal boy, but one day he meets a girl who cosplays with a blue cape. She calls herself "a researcher traveling from the outer world to search for the 'Dragon Terminal'". 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. In order to bring Ryouko back to real life, Ichirou accepts her and his past and begins the final battle as Maryuuin Kouga.

An emotionally scarred former child soldier becomes a letter writer in this condensed recap of the moving, gorgeously animated award-winning series.