There is no point in applying deodorant if you don't shower. You would still stink and this desperate/lazy attempt covering it is just stupid. It doesn't even work, I remember in middle school some classmates didn't take a shower after PE, just put deo on them, it was a mess afterwards in class. It just gets a mix of deo+sweat, absolutely outrageous. This is disgusting, take a shower.
The same thing applies to those kids trying to act cool by smoking and then coming to class with tonnes of perfume to cover the smoke, purely disgusting.
Wake up degenerate mongrels...
PS: It feels like I just saw an ad/commercial... this manga is going dowhill very fast