Yu-Gi-Oh: Vexal

The Numeron Code gave everyone what they wanted, but all Vector asked for was a clean slate. So he's reborn into the human world, where he lives an alien-free life, attends college, and makes strange friends, ignorant of his own past. However, everything he thought he knew goes out the window when the other Barians realize they need his help… - Post-canon, AU-ish, OCs, punny title.