Kidnapped Dragons

Yu Jitae is the strongest human alive, yet even six regressions were not enough to stop the destruction of Earth. The cause is tied to four young dragons who came to the planet for amusement and eventually ran out of control. On his seventh iteration, Jitae changes his approach. Instead of simply trying to destroy them, he decides to take responsibility for the dragons himself, raising and protecting them in hopes of preventing the apocalypse before it begins.