the mystery of pain

you were about to graduate from high school and you were soon going to move to a different school..or even a different country. but there was something that kept you up everyday , and everytime you'd pass it , it gives you the creeps.
you were so desperate to find out what it was for the past 10 years. and you still haven't figured it out. though you tried finding clues and ways to get through the mysterious thing but you can't.
and today was the last day you'd be in highschool and tomorrow you are officially graduating. you were in history class doing your work until you've thought about doing something tragic , you thought about it for the past few minutes and think it is ridiculous , you brushed it off and continued doing your work. when you were finally done with your work and your history subject , you exited out of history class. you once again passed the big wodden red door and huge scratches and a big keywhole...