You're searching your attic for stuff you could sell when you discover an old PC game with a blue number on the front. Curiosity gets the best of you and you place the game into your computer, ready to begin playing. While playing the game, you begin feeling surprisingly tired, and soon, you fall asleep.

When you awake, you realize you're sitting in a pixilated, cartoony classroom, with multiple empty desks around you and multiple school supplies around. Suddenly, the number from the front cover of the game wandered into the room, cheerfully prepared to teach.

"Hello, students! The name's Mr. Four! Is everyone ready for class~?"