The land was gradually but certainly becoming the sea.Those monsters became known as Abyssal Fleet.Somehow, only female beings could be produced, as they reject sex chromosomes that would determine maleness.Dreadful monsters from the sea came and attacked humans,Humans succeeded in capturing the monsters.*close*250 years ago, Earth's sea level started to drastically rise...They were called Ship Girl.To their surprise, the monster's organism are close to human's.Humans develop the Anti-Abyssal Fleet weapons by improving the monster.Thus...
