AIKa

A catastrophic earthquake has left Tokyo, and most of the Earth for that matter, under the sea. Aika is a salvager who retrieves various remains from the watery ruins. When Aika accepts the dangerous mission of locating and obtaining the mysterious Lagu, she discovers that she's not the only one after it.Aike, one of people who are hired to search the valuable information or artifacts for remnants of sunken Tokyo. An earthquake set in  the not-too-distant future, has pushed Tokyo under the waves and many people are making a living as “salvagers”....