在古老的星空中,残余的魔鬼碎片仍然尘埃俱飞,颠覆着整个宇宙之 Harmony. A shrouded villain, harnessing this dark power, wreaked havoc across the cosmos and targeted the realm of Light - the Serene Kingdom.
Brave warriors, Sir Leo and apprentice Knight Zeta, courageously confronted the menace. After a fierce battle, Zeta, alone, pursued the monstrous creature to Earth.
On our planet, humanity had formed the Monster Defense Force - the Mechanical Arsenal Squad, or M.A.S., to combat the frequent appearances of these monstrosities. Within this elite unit, a passionate young recruit - Shinichi Shirakawa – stood tall.
As the cosmic monster descended upon Earth, Zeta and Shirakawa's paths crossed. From that moment, an epic saga of two spirited youths embarked on their perilous quest to protect Earth & the universe from the forces of darkness.