Narrator says even if opponent is Strongest of all times, the King of Curses, everyone thought it was impossible. They thought Gojo might loose. Even Gojo himself thought so
Gojo thinks when was the last time he felt like this & Toji immediately pops up in his mind lol
Narrator continues that even tho the sign of loosing is coming up, something else is swelling up more in Gojo. It's "SATISFACTION". The loneliness that comes from being the strongest. What's filling him up now is...