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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!

Asahi Kashiwagi lives the typical life of an average high school student — until the day a TV fortune teller’s predictions come true one after another, culminating in a series of risqué encounters! Destiny seemingly draws five beautiful girls into Asahi’s path, and soon he finds himself fielding not one, not two, but five love confessions. Asahi will need to follow his heart to find the perfect love for him, or else his love fortunes may end in one epic flail and flop.

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.

Sakamachi Kinjiro discovers that the most popular student in their school, Subaru Konoe—the butler of the headmaster’s daughter, Kanade Suzutsuki—is actually a girl.

Rito Yuuki is unlucky when it comes to love — no matter how hard he tries to confess to his crush, his efforts end in failure. After another day’s confession goes down the drain, Rito spends his night sulking in his bathtub. But when a naked girl with a pointed tail teleports into the tub with him, it seems like Rito’s luck is finally looking up! His fortune doesn’t last long when he finds himself accidentally engaged to the buxom beauty who is none other than the princess of the planet Deviluke!

Keima is a dating sim champion. Cute girls are rendered powerless by his irresistible game playing techniques. Too bad things aren't that way in the real world. That is, until his tempting game playing causes a real live—and very bubbly-cute—demon hunter named Elsie to materialize! Now Elsie wants Keima to help her free hot girls from sneaky demons who secretly possess them.

Raised by his uncle after his parents’ deaths, Akiharu enrolls at a mostly female academy that specializes in training maids and butlers for high society placements.

Rather than take a more sensible approach to salvaging his grades in time for graduation, Alto summons a bit of otherworldly help. Only after does he learn he’s bound the legendary she-devil Vermeil into service as his familiar!

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.

Kodaka Hasegawa has just transferred to St. Chronica's Academy and he's having a hard time making friends. With his naturally blond hair and fierce looking eyes, people constantly mistake him for a delinquent. One day, he runs into his bad-tempered loner of a classmate, Yozora, while she's talking to her imaginary friend, Tomo. Since neither of them have any friends, they decide to form a club and start recruiting some. Little by little, lonely classmates join their club to learn how to build friendships through cooking together, playing games, and other group activities. But, with so many misfits, will the club members really be able to get along?