Anime Crossover: Defending My Earth

[Ensemble Cast] + [Behind the Scenes] + [Crossover]

Shen Du transmigrates by accident to the Marvel Universe and becomes a German duke.

After activating, the System turns out to be capable of merging with other worlds.

Years later, aliens invade.

The Heavenly Craft Guild, the Men in Black, and S.W.O.R.D.: If you want to invade Earth, you'll have to get past us first.

This introduction can't do the story justice. Read the novel to find out more.