Just recently, Sara Tanjuro transferred to Mikagami Eruma's elementary school and caused quite a commotion amongst the students. Known as Satan, she shamelessly expressed her love for various girls, something the reserved Eruma would never dream of doing. However, Satan held a secret identity as a member of Michaela - a group that merged technology and exorcism to vanquish angels who caused chaos in society. As the 666th member, Satan was a skilled specialist in anti-angel combat and even disguised school supplies as weapons. Victorious in defeating supernatural creatures, Satan made it seem almost effortless. If only courting girls were as simple...