Simultaneous time travel: invincible starting from the anime!

In the Sword Art Online world, Seiya, the champion of the National Kendo Tournament, is Kirito's lifelong rival. In the Prince of Tennis world, can a mere killing tennis ball be considered impressive? Let me show you what tennis that destroys the world is! In the Children's World I Recommend, a child star debuted and became a top martial arts star in the entertainment industry! In the Jujutsu Kaisen World, he is ranked first on the Two-faced Sukuna List! In the To Be Determined World, there are the Naruto World, the Pirate World, the Bleach World, the Valkyrie of the End, and so on...