What the heck is he even doing in that last panel though...? Looking in the opposite direction with binoculars... why??
Edit: Shoot, I didn't realize that those are two OTHER girls, not the lead girls, who are looking at the MC in the last panel there. I see at least one other commenter made the same mistake as me, and thought he was discovered by the lead couple there.
I love everything about this manga, I can certainly empathize with the MC as a fellow guy who wants to gently watch over this yuri couple's growth, but dude... why the heck would he wear a girl's uniform but not even have a wig to match it, all it does it freak out girls...