Supernatural, Action, Seinen, Sci-Fi, Mecha

Kuroi Souya got amnesia after getting into an accident that killed his family and now he lives with the eccentric maid Ginko and a large cat-person named “Sensei”. Two weeks into his transfer into his new school, strange unidentified objects appeared from the sea and started moving towards land. When the cities are evacuated, 7 heroes rise. Enveloped in light, they become mechas to take out the UFOs. As he watches this, Souya gets a call from Ginko saying it’s time to make his debut -- but not to fight the aliens. No, Souya’s mission is to defeat the heroes!