Mazinger Otome Taisen

Seto Magami walks home with Reito and Koji after school when they encounter Necro and Bui Jinga, earlier Mazinger android models created by Juzo Magami. The androids fight Seto and Reito, defeating them and warning they won't be as lenient next time. Meanwhile, Grace and Shiko face their doppelgangers, Dark G. Dark and Shin Kotetsu, who explain their goals without fighting. Necro invites them to join the New Mazinger Army, leading to a battle with the original Mazinger Army. During the conflict, Shiko and Shin fuse into Majeeg, causing both sides to cooperate. Majeeg becomes too powerful until Seto transforms into Astro Mazinger, defeating it and purging its corruption to free Shiko and Shin. Afterward, the Mazinger and New Mazinger groups coexist in relative peace.