Moving Forward at a Slow Speed

Background: In the year XXXX, phase bombs were successfully detonated in the □□□ area of ​​the human continent. From then on, the siren's blockade of the sea area collapsed. Later, with the precise ballistic shooting, the siren could no longer control the sea area. In the year □□□□, the human fleet once again took complete control of the sea area, and with it came... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.