End of 527 Years of Peace

After centuries of undisturbed peace, the humans felt the terror of monsters once again.  Trainees attended the festival of heroes. The youngest president of humanity was at the center of the stage to give his speech. After a few minutes, peace broke. Eh, the "Devourer of Dread", appeared and abducted the president. And so, the trainees would have to skip graduation and join a special mission to retrieve the president from the monster's grasp.  —Eh's pronunciation is like Ek, just with without the K sound, having a sudden stop before reaching the K.