La espada de Kaigen

On a hillside at the edge of the Kaigen Empire live the most powerful fighters in the world; warriors capable of raising seas and wielding swords of ice. For centuries, the fighters of the Kusanagi Peninsula have kept the empire's enemies at bay, earning their treacherous isthmus the nickname "The Blade of Kaigen." Mamoru, a fourteen-year-old member of the legendary Matsuda family of Kusanagi, has always known his purpose: to master his family's fighting techniques and defend his homeland. But when the arrival of a stranger exposes the secrets of Kaigen's supposed era of peace, Mamoru realizes that he may not have much time left to become the warrior he was destined to be. And worse, the empire he was born to defend may have been built on lies. Misaki told herself she had left behind the passions of her youth when she married and became part of the Matsuda household. She hid her sword, along with everything related to her time as a fighter in a faraway land, determined to be a good housewife and mother. But when her son begins to ask questions about the outside world, the threat of invasion looms on the horizon, and her insensitive husband starts to get on her nerves, Misaki realizes that the warrior within is fighting tooth and nail to surface.