Okay, even though I TLed it I actually laughed out loud a couple times while reading the finished chapter.
Mad props to @Martingatica56 for typesetting Niikura's headband every single time, I said he could just leave a note the first time, but no that mad lad did every single headband 😹 .
I just assumed it was her combat outfit, to go with the headband and energy drink (it's all a package of school kid going hardcore for exams), like Wako is in her duck (or whatever it is) outfit. And of course Nagumo is Nagumo. But it just shows how (needlessly) SRS Niikura is about this.
If I had to guess (since he was supposed to only do it for half a year) this CITY run will probably end when there's enough to make another full volume 9-10 chapters from now. He'll probably resume Nichijou a couple of weeks after that