Kaitei Seisounin Matataburris

Matataburris is a girl who retrieves requested items from a polluted sea. People who have extended their lifespans through body mechanization seek her out to recover mementos left behind on the ocean floor.

(Source: Harta, translated)

Note: The one-shot from issue 121 from Harta Magazine has been so well-received that it has been serialized.