Hetalia x reader

Menstruation simulator

pMenstruation is the most sh*t moment for every girls. cramps, mood, etc... are your best friends besides the blood. (actually the biggest problem of the month).
Last time every men in the school are underestimate it. They told you that's not even big problem, for them menstruation or cramps etc are simple problems. They thought it might be just like stomach cramps because too much soda or ice... =.=
So since lucky you, today's science project you made the menstruation cramps simulator. You ask the boys as your object.
-when they are try the simulator-
Well as you know they are become monster soon. as you know the class chaos... many punches and holes on the wall and (b/w)board... =.=;
After the simulation:
"Shits!!! That's hurt like hell dudes! damn... ugh... lucky me I'm a dude..." said Alfred a.k.a the American's dude while clutching his stomach limp. Sweat all around his face...
"Daz it! It's feels like someone is stabbing you inside at your lower part. Fick!!" Yelled Ludwig a.k.a the German who is clutching his lower part with his hand while the other's hand is on the wall with a hole on it... While the Italian's both of them are fainted with their pain expression. While the British guy which is Arthur is swearing while clutching his stomach. well most of the boys do that... =_=;
"For Merlin beard's sake. I'm so glad to be a man. Bloody hell it feels like you are dying slow inside."
"mon due!! Now never ever underestimate woman again. I think they are having such a God power to be so bare with this pain. I think I'm going to crying." said Francis while now curling at the corner who start crying.
While the Russian big guy, Ivan now with his dark aura and his 'kolkolkol' is crouching while clutching his lower part. he is sweating hard.
"kolkolkolkolkol.... it's hurt da!"
"aiyaa...!! poor girls aru, I'm so glad it's just simulator. I can't imagine if I were a girl... I think I'm going to faint...aru..." with then Yao is collapsed.
every men except Matthew aka the Canadian. now are fainting.
"that's why I never underestimate the pain of the month. so I don't need to feel the simulation, since it's so logic to understand it as a pain for girls." said Matthew while kumajiro, his polar bear nods as agreement. Suddenly.
"by the way, who are you?" asked Kumajiro to his owner.
"Kumajiguro, I'm Matthew, your owner. sigh"