Toaru Majutsu no Index - Volume 8, Prologue: One of Five Fingers. A_TOKIWA-DAI’s_World.

Louise Evardon's life takes a dark and twisted turn when she agrees to marry and discovers her husband's haunting past— all of his previous wives are dead.But that isn't what she has to worry about as someone is trying to get rid of her, and she needs to save herself before history repeats itself again.

Untolerated by heaven, a boy was restricted by the most powerful spell.

Three years ago, in the land of Reinbulk, a Legendary Hero was summoned in the Kindom of Leezalion and he succeeded in repelling the Demon King. Now, five students are summoned back into Reinbulk by the Kingdom of Luxeria to fight against the Demon King and the demon army. Unlike the other heroes, Yashiro Yuu has no magical affinity and the Luxeria Kingdom has no intention on acknowledging his existence or returning him to his world.

He once stained the rivers and mountains with blood, his brilliance unparalleled. Unexpectedly, he encountered a great calamity, a dragon trapped in shallow waters, everyone thought he was nothing more than a useless son-in-law. But how could Gold Scales belong to a mere pond? The returning king, under the name of Frenzied Son-in-Law, with the War God’s stature, swept across the Eight Desolations of the Four Realms, the world trembled beneath his feet!