Nerawareta Megami Tenshi Angeltia: Mamotta Ningen-tachi ni Uragirarete  

노려진 여전사 엔젤티어, 狙われた女神天使エンゼルティアー ~守った人間達に裏切られて~

In Syrup's "Many Milk," demons attack Earth, causing a field that drives men to lust and absorbing their carnal energy for strength. Yuuri is chosen by Suzune-sensei as an Angel Goddess to fight these creatures of darkness. However, when she becomes capable enough on her own, things take a turn for the worse. The demons have a new creature that can defeat even an Angel Goddess. Meanwhile, other characters are also after Yuuri and her gym teacher turns out to be more perverted than expected. It's not just Yuumi who has been compromised in this story.