Magic Stone Gourmet: Eating Magical Power Made Me The Strongest Volume 2 (Light Novel) by Ryou Yuuki

Ein begins a new chapter of his life at the academy, where he’s forging friendships and honing his swordsmanship. Krone, too, is doing her best to become the crown prince’s ideal partner. But academy life isn’t all studies and school-day shenanigans! Ishtarica is soon besieged by malicious schemes and the terrifying Sea Dragon. Against everyone’s wishes, Ein decides to face the legendary beast head-on! With his new life and homeland in jeopardy, the boy-turned-prince is willing to put it all on the line!