What if I’m not enough? “Mamoru-kun,” Yukino Sensei’s voice softened, “Your father was sixteen when he mastered the Whispering Blade, your uncle one year older, and they were among the youngest masters in history. You have time. I promise, you will be fine.” “You can’t promise that.” In his anxiety, Mamoru didn’t seem to be able to control the stupid things coming out of his mouth.