[Monster Summoning + System Errand Boy + Comedy + Adventure = ?]
The Third World War.
Only this world war isn't between humans.
It's a war in which monsters and humanity join forces to fight aliens.
In 2050, aliens invade Earth.
Monsters sleeping around the world awaken one after another to fight them.
In this war, the monsters serve as the main force and are nearly wiped out. Humanity also suffers tremendous losses.
With the tide turning against them, the aliens withdraw from Earth.
After the war, Earth's environment undergoes drastic changes.
Powerful forms of radiation grant humanity many new possibilities.
To withstand the next alien invasion, humanity must now evolve to a higher level!
P.S. Updates every night at eight, with no fixed chapter count.
Well, not bad!
Not bad, come on, author