Azur lane : Lord arbiter's fleet

After 10 millennia years of war with Lament,a series of catastrophic mass-extinction phenomena that have affected emperor Y/N realm,when they were defeated and flee into vast of space,Y/N and his fleet declare a grand crusade to hunt them down.a year after the crusade y/n and his fleet arrived at world that almost overrun by some alien species called "Siren",know those "siren"might has any associated with Lament,he decided to lend a hand to save humanity on this planet and give a gift that thy can use it to fight back against those sirens