One day Akatsuka Justice (nicknamed Seigi), a boy with a strong sense of justice, saves a man from some street punks. But the moment he touches the stone given as a token of the man's gratitude, a strange pattern shows up on the palm of his hand. The next day, when Seigi is baffled to notice that the pattern won't disappear, a mysterious girl appears before him and demands to know where he got the tattoo before suddenly attacking him.
but this is a key that will lead 
you to the truth of this world.
لكنّ هذا مفتاحٌ سيقودك إلى حقيقة هذا العالم
aber das ist ein Schlüssel zu den
verborgenen Wahrheiten dieser Welt.
pero es la llave que te llevará
a la verdad del mundo.
pero es la llave que te llevará
a la verdad del mundo.
C’est une clé qui donne accès 
à la vérité sur le monde.
ma questa è una chiave 
che ti condurrà alle verità di questo mondo.
Isso é uma chave que o levará 
até a verdade sobre este mundo.