This episode starts immediately in the flashback, when Ayumi is 8 years old and they would only be captured three years later.
Shichino has the powers of permeation, the ability to pass through obstacles.
Medoki has the powers of hypnotism. (Making someone fall asleep)
Maedomori can erase memories.
So, when Shunsuke (Shun) time-leaps over and over again to attempt to fix their world and protect themselves, he notices that each time he time-leaps, a little of his vision gets taken away.
And for that last time-leap, he made a decision that changed everything. He decided to build a school to protect ability-wielders and by doing that last time-leap, he lost his vision. Then he had Medoki to erase Yu's and Ayumi's memories of him so that he would be able to move freely.
After telling the story, Shun tells Yu to loot his ability to time-leap to save Ayumi.
Yu accepts and time-leaps. So, he waits in the locker where Ayumi was cornered and awaits until the perfect moment to save Ayumi. After that, with Tomori's help, he manages to scare her away.
He loots it and manages to save Ayumi, and Kumagami and Mediko appears before them to bring them to Shun.
