胎孕の双子魔法少女リンとマユラ～戦士の子宮は汚液で満たされ魔を孕む～（Taiyou no Futago Mahou Shoujo Rin to Mayura ~Senshi no Shikyuu wa Oeki de Mitasare Ma o Haramu~）

The earth opened and from its depths came the VIVO, giant world-enders immune to humanity's weapons.

Unable to fight, the people of Tokyo built a massive barricade hoping to keep the giants at bay.

But it only delayed the inevitable. The barricade was breached; all humans were r*ped or slaughtered.