Valkyrie Drive: Mermaid

In the Taiheimeji era, the Tokugawa shogunate values breasts highly, equating them with wealth and status. The Manyu Clan, government allies, know secret techniques for breast enhancement, detailed in a scroll. Chifusa, the clan's heir, flees with this scroll, rebelling against the oppressive norms set by her clan.

Every few years, beautiful female warriors from across the land compete in the Queen's Blade Tournament to become the ruler of the land. It's a series that loves violence as much as it hates clothes and complicated plots.

When Mafuyu Oribe and her adopted sister Tomo rescue a strange wounded man, they have no idea what they’re getting involved with or what the consequences will be. Alexander Nikolaevith Hell is an Iron Qwaser, one of many opposing factions of super-warriors.

The story takes place in Japan in the early 21st century, in an alternate reality where the Tokugawa Shogunate has remained in power. In this reality, student councils are tasked with oppressing schools. Yagyuu Muneakira is a high school student who rebels against his student council with the help of girls who've had the names of famous samurai heroes passed on to them.

Eager to follow in the footsteps of his fallen sister, Kazuya enrolls at West Genetics Academy, a training facility for buxom heroes known as Pandoras. These courageous schoolgirls are genetically-enhanced with enough sex appeal to cripple a man – and the superhuman strength to slaughter aliens by the dozen. Kazuya’s role is that of Limiter, a Pandora’s battle partner, and he quickly sets his sights on the most feared beauty in school, Satellizer el Bridget. This full-figured annihilator of aliens is as desirable as she is deadly, but rubbing her the wrong way could lead to gross bodily harm. Can Kazuya forge a bond with his new partner and rise to the top of the ranks at West Genetics? Or will he fall victim to the mysterious bloodlust lurking within Satellizer?

One day, humanity was invaded by another world. Having experienced that battle, known as Other World War I, humanity moved to marine floats, built for emergency evacuation purposes, as soon as Other World War II began. It's around that time that Kizuna Hida is summoned by his elder sister and visits the Strategic Defense Academy Ataraxia where he meets Aine Chidorigafuchi, a girl who uses Heart Hybrid Gear Zeros to fight the otherworldly enemies. He has a tough time dealing with her, but when her Gear runs out of energy, the only way to get it back in action is to do something lewd to her!