"The bell rings to end school... time for the devil's game." Meguri came to an all-boys school for her teaching practice. Young and beautiful, Meguri quickly became popular among the male students. The students gathered around Meguri at lunchtime, and after lunch they played on the roof. Seeing the students' smiles made Meguri happy. That was until they played that game... One day after school. The students invited her to play "Daruma-san ga Koronda." Meguri was the Oni, and turned her back to the students and uttered the customary words. Then, little by little, the students began to walk towards Meguri. Their innocent smiles disappeared, and they took on crazy looks, ready to rape Meguri...