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About This Series

One day, humanity was invaded by another world.

Having experienced that battle, which came to be known as the start of Other World War I, humanity moved en mass to marine floats, built for emergency evacuation purposes, as soon as the bell rang for Other World War II less than twenty years later.

It's around that time that Kizuna Hida is summoned by his elder sister and visits the Strategic Defense Academy Ataraxia on the Japanese float, 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 saucy nature and sharp tongue, but when her Heart Hybrid Gear runs out of energy after fighting the enemy, the only way to get it back in action is to do something lewd to her!

With the future of humanity on the line, Kizuna would go on to perform lewd acts with loads of girls!