Responses
This isn't even fast development, this is just author saying "i want you all to create the whole process of them starting to know and like each other yourselves, in your minds, because I don't want to do it myself"
He said "you'll never change" when he knew her for five minutes, then he said he would go anywhere if she was there when they knew each other for a day, and on the second day of ever knowing her he's feeling comfortable enough to clean sauce from her lips with his finger then lick it. What's up with him, for real