Tokyo has been sunk into the ocean, along with most of the world, during a large-scale land subsidence! Aika Sumeragi is a salvager who works for a small company run by a father and daughter tandem. Alas, the company isn't exactly successful, and money is needed desperately. Thus, Aika accepts the very dangerous job of acquiring an artifact called Lagu for a hefty sum. The boss's daughter Aida Rion joins Aika on this particular mission, and the two set off.
简介：Tokyo has been sunk into the ocean, along with most of the world, during a large-scale land subsidence! Aika Sumeragi is a salvager who works for a small company run by a father and daughter tandem. Alas, the company isn't exactly successful, and money is needed desperately. Thus, Aika accepts the very dangerous job of acquiring an artifact called Lagu for a hefty sum. The boss's daughter Aida Rion joins Aika on this particular mission, and the two set off.
