When Gojo makes a wedding dress for Marin. By white day, perhaps? (Yeah, right!)
For those who are wondering what came over Gojo, may I direct you to ch. 99 pp. 15-16?
Paraphrased: "Make people fall in love with you!" -- "I shouldn't have said that."
That
must be about the quality of the costume of course. I mean
what else could he
possibly be thinking of? </sarcasm>
Then we get to ch.100: On p.17 Marin is thinking "I hope I can keep doing this with Gojo-kun forever..."
Then she gets an offer of becoming a professional cosplayer, and on p.20 the "with Gojo-kun" part gets overwritten. (Clever bit of layout there).
Marin, I swear, if you make Gojo sad I will not forgive you!