In DxD with Sign-In System! Novel

Hibari Kyoya, an ordinary student living in Kuoh Town, finds himself transmigrated into the DxD world. For eighteen years, he has survived in this dangerous realm filled with gods and monsters, acutely aware of his own powerlessness. His fate changes when a Sign-In System suddenly activates within him, providing a glimmer of hope and the promise of strength he desperately needs. The system grants him a Rainbow-Grade Gift Bag upon activation, marking the beginning of his transformation. By completing the system's assigned tasks, Hibari steadily accumulates powerful rewards that enhance his abilities. Through these accomplishments, he obtains remarkable powers including the Perfect Rumble-Rumble Fruit, with its original weakness to water removed, and masters the legendary Flying Thunder God Technique. Armed with these gifts, Hibari begins his journey toward genuine power in a world where survival was once his only concern.