Yuuka's boyfriend/husband has a brother in the band "Zero Sum" as the lead singer. After a request, she and her husband Yazaki got tickets to go backstage at a concert. However afterwards, all the band members, except Keith the leader, kidnapped her and raped her on the roof top all as a scheme by Keith who is madly in love with his brother. Now she can't forget nor can she get away. 
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(Source: Anime News Network)

There is a bridge that divides the town, separating violence from non-violence, immorality from morality, sexually abusive lifestyles from ordinary lifestyles. There is no order beyond that bridge.

Story begins as Momiji's chastity is taken by Kazuto. We learn that Momiji is a girl without a will of her own, while Kazuto is the son of a wealthy and influential family. Kazuto took an interest in Momiji when he saw her at school, and he went out of his way to get her to come live in his house as a maid.
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(Source: Anime News Network)

A gang of soldiers have their way with women are under their protection. The women and the soldiers are trapped in enemy territory, and they must find a way to rejoin their main force if they are to survive the war.

This first entry in the Angel Core series follows a young soldier (fighting for a fictional, futuristic empire) as he's transferred to a secret military installation, where's he surprised to discover that his new job will be having sex with gorgeous young "Angels," a group of genetically unique women who need regular intercourse to nurture their powers.

Blue Eyes