The time travelers return to the future, and learn the true history of their world. Though they were unable to change the past, they are determined to correct the present and shape the future.
Nana sends Jail, Lynn, Pele and Hina 300 years back in time. They arrive at an unknown institution with technology far superior to the world they are accustomed to, and meet Rihito, a young man Hina is convinced is Licht himself.
A voyeur is regularly sneaking a look at the girls' bath, and the students are tasked with catching the culprit. Meanwhile, Jail attempts to find out more about this timeline and figure out why Nana sent them here.
Jail discovers more secrets about this world through Nana, but is intercepted by Alan during his escape. Meanwhile, the students of Class A come closer to realizing their dream of becoming a military force that does not take human lives.
Nana throws a party for the weary time travelers after their long journey through history. One by one, they recover from the gloomy atmosphere brought on by what they had witnessed.
Licht takes off on his own and faces off against Doan, whose power completely overwhelms him. The others chase after him, while Jail visits his adopted father to seek closure.
Jail reveals his true Count of 12500. He even overtakes Licht in raw speed, Licht's specialty. As the townsfolk and Lynn look on, Licht is backed into a corner.
Jail, Lynn and Pele enter the town of Linden and discover that its inhabitants were annihilated by an unknown entity. Jail is confident that Licht must know something about this.