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.
With Mizuka subdued, the only opposition facing Licht is Doan. Doan traps Licht in a prison of gravity, from which there is no escape. Hina, however, still believes in Licht.
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.
After Nana's party, Hina confronts Licht as he is about to take off on his own again. As Schmerman's Special Service Unit pursues its own mysterious goals, Alex contemplates his next move.
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.