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...Author's Other NovelsStarting from Pirates, Myriad Worlds Simulation