The main character, a boy named Inori Kobayakawa, is one of those who were invited to this Morinomiya Academy through the manifestation of a “gift.
The characteristic that manifested itself in him is that he “cannot carry over new memories except for one thing he has decided to do.
The first time I saw this, I was surprised to learn that the “new” version of the “old” version was not a “new” version.

You don’t forget everything. You can only remember one thing.
“Finding that one thing…
I imagine it’s the only thing you have to accomplish at this school."

The protagonist lives a quiet life in a closed school, worrying and hiding the “fetters”…… loneliness of a lifetime in his heart.
Then a transfer student, Ren Mikuriya, appears before him.
She says, “I don’t want to give up anything. I want to experience the joy of youth here.
Then she says, “Because I will die soon.” ……

This is a story that questions the meaning of destiny.
God is certainly there, and he keeps asking the boys about it.