The Forget me not Cologne, John's latest invention stood finished and ready for testing! When sprayed on an unsuspecting victim it targeted the memory centers and the focal points of the brain that were concerned with concentration and memory. This would have two effects, first it would erase someone's short-term memory like a spray on rupie, but also block out the part of their mind responsibly for creating new memories when specifically pertaining to them, in other words whoever used it would be completely forgotten and invisible to it's target! They could spray to make someone forget, than linger around them for hours and never be noticed, it was the perfect stealth tool!
Of course, John's friends like Sarah and Melissa thought it was a little hairbrained, but what would they know. John was a brilliant young inventor and innovator, and once he used his new spray on serum he'd see all the dirty, strange or interesting things that go on in the school unnoticed. He chuckled at the mere thought of it, putting it in his bag as he quickly ran off to catch the bus for school.