I Was Invincible Before, and I'm Still Invincible in the 1980S

The invincible protagonist finally arrives in the 1980s and conquers the world in just a few short years. Then he returns to his little home in the countryside, hoping to settle down and enjoy life. The protagonist is invincible from the start. His invincibility isn’t the end of the story, but the beginning! (A parallel world set in the 1980s and 1990s, with an invincible protagonist from the start. The story focuses on daring to dream and take action, with one independent-minded heroine who settles problems with her fists. Add five well-behaved children, and he’s a true winner in life. The main focus is family.)