[G1] Zenra - Kamen Daiin! that's a hell of a bad idea.

At DoS Gakuen, one of the nation's leading super-advanced schools, there was a lot of violence and jealousy instruction. The head of the school, Murubei, who has the hands of an ogre to find out the true identity of 'zenra - mask' that will save students from such a hell instruction, middle-aged detective romance, and the president of the school! However, women who have been suspected of 'zenra - mask' are rescued one after another by 'zenra - masks'! What is the true identity of a mask? Can you break down the bad hell instruction? [BAD END]