Dark Shell: Lust in the shell Vol. 1
When the paradise is lost  

ダーク・シェル 檻の中の艶

At the end of World War II, after dividing up the nation, the countries that defeated Japan failed to rule the island. As a result, many independent powers were established, fighting amongst each other and trying to seize control. They developed a hatred of one another, leading the country into a never-ending spiral of a civil war. Snipers lurk around every corner. But they had what every soldier wants, some hot women to keep them company. Every group of soldiers has a den of lustful lovers. One by one they would have their way with the voluptuous beauties. The fighting still goes on around them, and Fukushima’s girl might not make it through the end of the war. Will he snap?

Dark Shell: Lust in the shell Vol. 2 Skin that cries  

ダーク・シェル 檻の中の艶

The story opens as the remaining three women and three soldiers try to make their way to the base of the main force. Thirsty and exhausted, Tomoko asks the soldiers to give her younger sister, Moe, something to drink. Sergeant Kureda says that if they're going to have a break, they'd need a good reason. This leads to Kureda and Fukushima gang raping Yuka in front of them all. Kaoruko's dark past is revealed, in which Keita, her boyfriend is lynched and killed, while enemy soldiers gang rape Kaoruko...is this there no salvation for all these people anymore?