could have sworn in one of the older chapters she said she was a virgin i guess it was just a lie if not then that would be a pretty bad inconsistency
I also don't remember if she did say to the mc that she was a virgin or not, I'm confused too Gappy
There was a repeated page with different dialogue where characters behaved very out-of-character in one chapter. Dialogue didn't seem to follow from what happened the page prior (which also seemed like a chapter-end page). It seemed very clear to me that was a gag page created by the scanlation team (making fun of some commenters interest in Sayu's 'purity'), but some people seem to have interpreted it as canon.
So, I've searched for it, and it's Striptease's release of chapter 16. The second-to-last page has the usual flair that every final page of every chapter has and clearly states "To be continued in the April issue.", but then another page (page 42) shows up, which is basically a repeat of page 29, but with different dialogue.