15-year-old Louise Tuckerman has Ace, an M4A3E8 Sherman, in her basement, belonging to her grandfather, who was its commander back in World War 2. With him now passed on, the tank was discovered by officials and caused a stir. With an unexpected offer from a Japanese high school uniting the survival of the tank and her desire to participate in tankery, her answer is obvious.

When a new, revolutionary type of warship from a pirate faction took to the seas, the oceans and skies will never be the same again. And they've got three of them. This is the story of one of these vessels. What will the Blue Mermaids do? What has fate in store for everyone? And who exactly is the captain?

The year is 2019. Well, at least it was to Adachi Narahiko before he drove down Mount Akina in his SA one night. Now, in an unfamiliar time in a once-familiar place, his wish to return to a past era has came true. The people he'll meet, the experiences he'll go through; oh, how ignorant he is of what was to come! What is certain, however, is that he'll love it.

An ambitious conquest. A dispersing empire seeking peace. A battleship. And Earth is caught between them, too. When Susumu Kodai discovered an advanced alien spacecraft under the sea, he had no idea how much it was going to change the lives of every human alive, and the attention implications that came with it. Yamato, hasshin! (Alt Universe)

A girl was turned into a gem and sent into the future of a parallel Earth, where gems live on the remaining land left after devastating assaults from asteroids changed everything. Her/their very presence has thrown off the intended timeline of this world, how will things now play out? (OC gem)