When Kim Roksu mysteriously awakens inside an action-packed fantasy novel, he decides to make the most of it. Now living as the rich noble Cale Henituse, our protagonist collects flashy abilities and unexpected allies in his pursuit of a cushy life! After foiling a mad mage's terrorist plot in the capital, he travels to a coastline of vicious whirlpools to find his next Ancient Power. There, he meets siblings from the Whale Tribe who are as beautiful as they are deadly. For ages, the whales have kept their sworn enemies at bay—the bloodthirsty mermaids—but an unknown power from the depths of the Dark Forest has made their foes stronger than ever. Will the mermaids, monsters, and magic of this vibrant fantasy world be enough to derail Cale's ambitions of a luxurious, carefree future?