Ryuu ni Sodaterareta Saikyou: Subete o Kiwameta Shounen wa Ningenkai o Musou Suru

From Google Translate:

Iren is a human child raised by the strongest race, the Dragon Kings. One day, the Dragon Kings decide that humanity's plundering has exceeded its limits, and give Iren the mission to determine whether humanity will survive or perish, and decide to enroll him in the Royal Capital Academy, where children of the elite class attend. His classmates, who are not yet aware of Iren's mission and true abilities, treat him with contempt as a commoner from the country, but...!?