Disclaimer: I do not own the characters Bloo and Nergal Jr. from Foster's home for imaginary friends or The Grim Adventures of Billy and Mandy. Both of them are owned by and belong to Cartoon Network.
It happened 3 months ago in CityTown at Mac's school where their class teacher has an announcement to make to all her students. "Class if I can have your attention please attention, please?" All the students are making so much talking to one another you'd think the kids we're trying to ignore her, by tuning her out. (Sighing) "Looks like I'm going to have to start doing THIS again from now on everyday before having class then". She walks to class storage closet, gets a yard stick from the shelf labeled, "Spares Of Thick Magic SHUT THE FUCK UP Measurement Sticks (in small letters written below) hurts so loud smacking against a flat surface you'll never need to rise your voice again (available in Oak Wood and Titanium Steel)".
She then walks back to her desk and gets her soundproof ear plugs on, and Mac sees his teacher coming from the storage closet and his eyes widened with a Oh Shit look on his face, because he knows exactly what that yard stick does, how it works, and above all else he shuts his eyes closed tight and covers his ears as hard as he can because he knows how loud it gets using too much force, assuming she's holding it with two hands, which she hits it against something hard and flat. "Here it comes." Mac say quietly as he knows what's going to happen now. The teacher swing the yard stick with both arms on the top of the desk making a loud noise which hurts so much to listen it sounds someone set of a gun next to their ear, at point blank range which SHOULD cause deafness. All the students stop what they're doing and stop whatever they were saying not concerned they're lost their train in thought which doesn't matter anymore.
All the noisy kids know: "Don't make teacher have to use one of her measuring sticks just to get her attention, the hard way again OR ELSE!" Most of the students were slightly startled by the sound While others were having their ears ringing just barely, because the ones that were startled knew despite how painful that sounded she WAS still holding back on their account AND her benefit as she took the ear off.
"Now then class, I know you all know painful that sounds using this, I'd know I can still hear through my plugs (remember to lecture the store clerk and the manager that I want my money back for these cheap ear plugs), next time you all remember will tune y'all's conversations down so you can still hear me speaking. With that out of the way, don't... make... me... need... to do this... Again, understand everyone?" She asked slowly as she rised the forbidden yardstick down to her hips. "Yes mama." The entire class "Now then, with THAT out of the way, I have an announcement to make. Everyone, we have a new exchange student here today who's recently transferred from Endsville class." She said. "Come on in newcomer." The new exchange student came out from the hallway into the classroom and the new kid's slightly odd appearance made exchange student stand out from everyone else. He was a short young boy with black hair, pale skin and green eyes. He wears glasses. He wears a black shirt, black jacket, black pants, red scarf and black shoes.
"Hello everyone it is a pleasure to meet you all. I hope you all will consider me as a friend here and not as an unwanted Outcast like everyone else does around me. With that said introductions are in order. My name is Nergal Jr. but everyone normally calls me "Junior". Just don't say anything to offend me, mock me, provoke me or anything that could upset me, I'm known for being short-tempered (Whispering so no one can hear him muttering) and being aggressive with a violent streak."