Cat Planet Cuties

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!

Natsuru is selected to be a Kampfer, a mystical fighter who has to fight other Kampfers. The catch is that all Kampfers are female, and Natsuru is male... at least he was! Worse, Natusru's best friend turns out to have a crush on his new body.

High school student Hiiragi Seiichi is bullied by his classmates for being a "loser." One day, his entire school is suddenly transported to a video game-like world of swords and sorcery. When he accidentally eats "the Fruit of Evolution," his life as a successful "winner" begins.

Miaka, a junior high school student in Tokyo, has normal problems: fights with her mom, entrance exams, and deciding where she's going to go eat with her friends. But when she finds a mysterious book in the library, her life is changed forever when she and her best friend are transported inside!