Title: To the Dawn That Will Come
Original title: A Farewell Letter
Tips: Satoru Gojo-centric; no romantic pairing; the timeline covers the month between his unsealing and the final battle; Gojo is left with aftereffects from being sealed; warnings for some self-loathing; a story of love and hope, waiting for dawn in the darkness.
The bolded text comes from: If I Could Become Someone's Heart
"Because it sounds so cheerful, no one will think it's a farewell."
This is a long goodbye, sent from 2023 to 2024.
Theme: Dawn will come again.