My Father the Laborer Is a Billionaire?!

The world's richest man, Koichi Mikage, hides his identity and raises his son while working as a convenience store cashier. But his son marries Yuki Hanyu, the bride of the arrogant Hanyu family. Surrounded by an intimidating fiancée, mother-in-law, and sister-in-law, his son Kazuma Mikage is always put in a passive position. He didn't want his father Koichi Mikage to come to the wedding, but Koichi absolutely refused to give up attending. At the wedding, Kazuma Mikage is mercilessly bullied, and Koichi Mikage stands up for his son. Despite facing ridicule, he offers a huge congratulatory gift, but he reaches his limit when he endures alcohol from malicious relatives and insults to his late wife. Just then, the powerful man's stepdaughter, whom he once raised as an adopted daughter, suddenly opens the door and appears, declaring that she wants to become the bride of the Mikage family, shocking the entire venue.