Tokushu Nouryoku Tougatsu Gakuin: Hangyaku no Yuutousei to Akuma wo Kansuru Shoujo no Kyouhan Keiyaku

A girl falsely carrying the title of honor student and demon. In order to take back past days this contract has been formed―― Snow white wings shining in the night sky. Countless lightning strikes raining from the sky. The powers that cause these paranormal phenomena are referred to as ≪Kyoui≫. -Special ability control Academy- A institution meant to protect and educate ≪Observers≫, girls who carry unique powers. But in reaility, it's a place where these girls are being isolated, controlled and in the end, put to use. Shimon is acting as a honor student and aims to become a supervisor so he can investigate a childhood friend of his, who has been brought to one of these prison academies and had her everyday life stolen. One day he forms a contract with a girl carrying the title of a demon 『Asmodeus』, a subordinate of the institution and――. I will definitely come and save you, even if i have to make the entire world my enemy. (Source: MF Bunko J, translated)