@Zaveghunterthe white short haired girl Kiyoka probably didn't say it out loud. that 'AH' is probably a internal scream or facial expression, seeing how it is not in a speech or thought bubble.
@Zaveghunter That pages shows that Mittchan yelling by her speech bubbles so Kiyoka should already wins but nah MC wouldn't graduate from a virgin that easily.
OF COURSE THE CHARACTER DEVELOPMENT WAS A LIE The author wouldn't want to lose such an annoying character used for "comedic" purposes, right? Because physical violence against MC and calling him a pervert is o-so-funny.