In case it's lost on anybody: in Japanese, "iku" basically (in slang) means "cumming", and also means "to go". So she was conflicted because if she said she'll "go" (on the date), she would lose because she would say "iku" (which could mean she's cumming).
I'd consider myself lucky to have been busy for the day and missed the part where NTR apparently wasn't tagged when this first came up...
Really, tagging is pretty important, especially when it contains content that some don't exactly...like very much.
I´m pretty sure the date will lead to her being gang banged at the toilet of the amusement park while he waits with cotton candy at the roller coaster...
Believe me, I would wish for an outcome in which he beats the bastards up and saves the girl, but there is not a second chapter and looking on how they mistreated him at the beginning of the story, it´s more likely that they beat him up and force him to watch how they fuck her...