Isekai ja Slow Life wa Mamanaranai ~Hijirijuu no Shujin wa Shima Sodachi~

After sacrificing his life to save a child, a young boy named Lyle is reborn into a fantastical new world. Far from living the quiet life he might have hoped for, he enrolls in the Royal Academy at just eight years old. There, he spends his days happily alongside his loyal companion—a twin dragon—and a spirited tomboy princess. As he delves into forgotten ancient magic and crosses paths with a colossal S-ranked demon, Lyle’s extraordinary abilities continue to grow. However, his peaceful school life is violently interrupted during an extracurricular training exercise when a swarm of rampaging wyverns launches a sudden attack. Determined to protect his friends, Lyle and his holy beast stand their ground against the onslaught. The situation escalates into a dire crisis when a two-headed dragon, having evolved into a terrifying, immortal evil creature, emerges on the battlefield. Trapped in a seemingly hopeless predicament by this monstrous foe, Lyle refuses to surrender. Relying on his unique bond with his companions and his mastery of lost magic, he devises a daring secret plan to turn the tide of battle and save everyone from impending doom.