Its been years since they all had Graduated from Hogwarts, And even more since all the fight in Harry Potter had run out. He gave up on working as an Auror, and was able to give the job of Head Auror to Ginny, as Ron had become an Unspeakable. Hermione was off doing what she normally did, trying to make the wizarding world a better place. And Harry, though not fully skilled and adept at it, learned to love being a curse breaker. No fighting, and only worrying about reading something wrong. It also helped that with his Parseltongue, he could have the snakes leave.
But now, he's working on borrowed time after in incident during an excavation on one of the tombs they had found. Through a letter sent by Bill, Ginny learns of the curse that Harry has had placed on him, and gets the help of the only healer she knows that can help her save Harry.
The only Healer whom had taken years of studying curses so that he himself, could get rid of his own, Draco Malfoy.
Transmigrated into DxD World-Kuoh Town, Hibari Kyoya. an average student, spent 18 agonizing years in the world fully aware of the dangers, knowing he is utterly powerless in a world of gods and monsters, Until...
[Ding! Sign-In System loading... 20%... 50%... 80%... 100%.]
Destiny, it seems.. has a cruel sense of humor. A [Sign-In System], long overdue, finally bursts to life within him, offering a chance at survival, a chance at power...
[Ding! Congratulations! You have received the Rainbow-Grade Gift Bag!]
...
He then started completing System's tasks, accumulating even greater rewards.
[Ding! Task completed. Reward: Perfect Rumble-Rumble Fruit (Weakness to water Removed).]
[Ding! Task completed. Congratulations to the host for obtaining the Flying Thunder God Technique!]