Mortal Flesh, Hero Water!

The jungle surrounding Yōen Village lay shrouded in indistinct, shadowy shapes. "Lord Yahiko, wake up. Those Takigakure bastards are making moves again," a "demon" with sensory abilities said quietly. "Hm? Oh, they're at it again? Haaah..." Yahiko responded groggily, opening his eyes in a daze and letting out an exhausted yawn. He could now skillfully maintain Constant Full Focus, keeping his breathing fully concentrated even while asleep. But he was still too young, his body not yet fully developed.