I've been transmigrated for sixteen years, and there are no senpai, Hirano, Mai Sakurajima, or the Four Schoolyard Kings… Not a single one! After the System tells me the world will end in five years, I have no choice but to become a mastermind and a troublemaker to stay alive.
At night, an unknown Holy Grail War unfolds in Tokyo. Heroes from antiquity cross time and space, fighting one another for the one and only wish.
When the gods people revere betray their faith and descend upon the world in a frenzy, the battle between mortals and gods will shake the world.
A demon god sealed for a thousand years awakens, plunging human society into crisis. How will they survive this time?
Saving girls who have fallen into the abyss under various secret identities.
Wait, I'm supposed to be a mastermind, so why do so many girls like me?
(Includes varying degrees of references to manga such as Evil Spirits, Hidden Words Island, Destiny Lovers, Revenge Classroom, My Maid Girl, Spy Family, and Slaughterer.)
