-Sins-

A new student, Sara Tanjuro, has drawn attention at Mikagami Eruma's elementary school. Known by the nickname Satan, he openly expresses affection toward many girls, a behavior that contrasts with Eruma's reserved nature. Unbeknownst to others, Tanjuro is part of an organization called Michaela, which uses technology and exorcism to combat angels that disrupt society. As member 666, he specializes in fighting these supernatural entities and has modified school supplies into weapons. He easily defeats such foes, though winning over girls proves more difficult.