I'm Just a Student, and You Want Me to Pilot a Mecha Against the Zerg?

[No System] + [Mecha] + [Insectoid] + [Beaver] + [Military academy] In Year 35 of the New Era, humanity celebrates its interstellar migration, unaware that a pair of blood-red eyes has opened in the depths underground! A twelve-year-old boy sounds the alarm about an Insectoid invasion at a museum. While festival lanterns still hang high in the sky, the blades of an alien species tear through humanity's defenses! Forced to climb into a combat mech, the boy discovers that this machine is more than just a “weapon.” It's the key to unraveling the mystery behind everything. While humanity still has no idea where the attack came from, the boy seems able to see the Insectoid army lying in wait underground... [They're not beasts... They're the “original inhabitants” who arrived on Nova before humanity!] As the boy grips the bloodstained control stick, the fight to the death between humanity and the Insectoids begins the moment he presses the start button... The Insectoids' declaration of war... has officially begun… [In the end, who are the real insects?]