The Loser Janitor is the Ultimate LegendEpisode 28

Twenty years ago, Grand Lord Cyril ended an alien invasion but lost his wife. He vanished into a janitor's life, raising his son and refusing wealth or titles. After saving a girl, he's set up on a date with her mother—a tycoon. Mocked as unworthy, he stays silent until he reveals his identity, humbling his tormentors. The aliens return, and corporations debate whether to save the poor.