"You broke our promise, so I'm breaking up with you". Two people so in love in high school who decided to elope. Fifteen years later, Kusaka suddenly tells Mikuriya that they should break up. But why?! Mikur...

In a war-torn world: Every day, Sak suffers as he attends 'the School', a research facility studying 'possessors of the Core' - people who have obtained special abilities... And the reason for his torment is...