My Hero Academia: Two Heroes (Light Novel)

Summer arrives after the climactic finals at U.A. High, and Deku and All Might receive an invitation to visit I-Island, a huge man-made floating island out at sea. There, Deku meets a Quirkless girl named Melissa, who reminds him of his former Quirkless self. But then, the island’s security system is hacked by mysterious villains, and the people on the island are taken hostage! Now, a plan that could shake the structure of hero society has been put into motion, and the key to stopping it lies with the number one hero, All Might!
Notice: This book is written in Japanese.