BAU

When Theodore was dropped into a waterway by his half-brother, he suddenly recalled the memory of his past life. He had been a Japanese citizen known as Kirishima Kagehisa, placed inside VRMMO character he had made in Break Force Online. "Theodore" is a Combat Mage that Kagehisa played within BFO, and he realized his skills were progressing well even in this other world. Theodore, who had lightly brushed off his half-brother to make his own place in the world, had ventured off to the large labyrinth existing at the Boundary City, Termuilles.

Fierce Vikings and mystical Sirens face each other in a neverending battle over their greatest source of life: the sea. Vikings, the world's fiercest warriors and greatest sailors rule the land. But the sea has never been so easy to claim, for another creature dwells within it: the Siren. For generations, Viking clans have had to face Siren tribes: a constant battle between cunning and brute strength, and charm and sorcery, with the vast ocean in between. In each book in the series, their paths intersect, for better or for worse.