Ship girl + mecha + science fiction + realism
Homemade prequel to Azur Lane if World Line
It tells the story of the early stage of the invasion of Siren civilization, when a biological weapon called SC served as the Siren pioneer and continued to encroach on the coast. In the early days of Azur Lane, before the birth of the ship girl humanoid, humans operated mechas and ship suits to resist the sirens with their own wisdom and courage, and exchanged blood and tears for the dawn of the continuation of civilization.
I think it's well written
Neither good nor bad.