Muv-Luv ATE全名为《Muv-Luv Alternative Total eclipse 》,全集动画片改编自《Muv-Luv Alternative》的外传小说。故事的时间设定在西元2001年,由于人类遭到地球外起源种(联合国称其为BETA)的侵略,正面临灭亡的危机,因此人类开始了先进战术机技术开发计划“XFJ计划”,各个国家均派遣了专门人员参与其中,该作讲述的就是这些被派遣过来的人员之间的故事。
A cloaked figure slips into an exclusive psychiatric clinic and murders one of the female patients. Meanwhile, various sexuals liaisons are revealed. The mystery killer continues with his massacre: he beheads a nurse with a scythe, pushes a chauffeur into a spiked “Iron Maiden”, strangles an older female patient, kills a nymphomaniac with an axe, and shoots a lesbian through the neck with a crossbow. Doctor Clay and the police set a trap for the killer using one of the attractive female patients as bait. However, they are not prepared for the onslaugth that follows…