Attack on Underverse

Steven Universe and Undertale in the AOT setting,only in modern time. Humans,Gems and Monsters have lived in harmony millions of years after the near extinction of humanity because of the Titans. Come on this hell of an adventure and carve your own path, either SAVE THEM ALL,or reset. This decision is yours,and yours only,hang out with the casts of Undertale and Steven Universe,gain their trust or betray them. it's up to you.

(Story)

the Titans are back,and have forced Monster,Human and Gem alike behind walls. as the rest if the world decays,Y\N is his\her own path to disrupt the mass extinction, but there is one setback,Chara,the demon of Frisk has possessed Y\N. Leaving him\her confused and broken.