Sirius Cavalry

What is hidden in the depths of the universe? In 2054 AD, mankind officially announced the discovery of extraterrestrial civilization. The arrival of the invaders was also announced. Accompanying the arrival of snakes and insects is a mysterious species called Sirius. A blessing in disguise is a blessing in disguise. I swear here with the honor of the Sirius Cavalry that I will defend Blue Star and human civilization to the death, and wish that human civilization will continue to carry on the fire. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.