It's strange, because this is the only chapter where Shinji actually says something to Miku about how she dresses or how she presents herself, even though she's been showing panty since day one. Hell, she even let the Principal grab her chest for the "wife contest" and Shinji didn't seem to care but here it's a lecture and Miku saying "You're the only one I'll let leer at me" despite rubbing up to other guys and showing her panties all the time. This manga is the essence of doublethink and shows the hypocrasy of the average person. I wouldn't call it only "bad writing" because contradicting emotions are real, but I think some of it is. For this series to be as "innocent" as it wants to seem it definitely should've cut Miku being all touchy feely with multiple people. This series definitely wants you to see Miku as a maiden rather than a whore, but it's not really doing a great job of that.