Mecha for Everyone: I Can Summon the Five Tiger Generals

In Starfall Year 1, massive spatial rifts appeared above Blue Star, and countless alien beasts crawled out and began invading the planet.

In Starfall Year 10, humanity launched the Spark Program.

In Starfall Year 109, the first humans gained the ability to summon mechs, and thus began the counterattack.

From then on, "The road of exploration never ends."