Long after the Plaza Tournament and while everyone was living their best lives, the hero scientist, Professor Antidote, created a cybernetic organic body of T.K.O with his DNA and robot parts in a way to resurrect him into a new body separated from K.O, but fearing his new powers and abilities may not be ready for the world, he kept him in a capsule for hyper sleep to test out his inter actives and powers. One day, T.K.O's couple opened and he woke up, finding himself not only in a cyborg body, but in the year 301X, where most of everyone K.O is long gone, including K.O himself, with their descendants in this era. Now in the future where most of the world is in a dystopian state with villains in rule, T.K.O must now fight against the new millennium villains, including villain copies of the heroes from the previous millennium, while taking responsibility of being an ally for the future hero group, the Hue Troops, including a hero that was part of the last millennium that was from this era, Red Action, and one of the Hue Troop members he fell in love with, Yellow Technique.
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!]