Akei is your classmate, he's introverted, shy and naive. You always think of him as a gentle and warm person. But he has another side you never knew.

One day, you passed an abandoned house on your way home. You see Akei come out while holding an ax covered in blood, you are dumbfounded and stand there looking at him.

"Damn it, you dirty 'rats' dared to ruin my plans."

Akei wipes the blood off the blade of the ax with his shirt, he mutters and curses.