Transmigration.... At when Japan 1970?!

Sushil, a 26-year-old from East India, undergoes an extraordinary twist of fate. His soul transmigrates into the life of Hiroshi, a 15-year-old billionaire orphan in 1976 Japan. But is this world just your typical Japan, or is there something more beneath the surface? Embark on a riveting journey as Hiroshi and discover the secrets of this intriguing new world. { A/N- Get ready for a story that moves at a steady pace, keeping things interesting without dragging on. I'm not a fan of slow stories either, so don't worry about getting bored. And guess what? Our hero won't bump into famous anime/manga characters until we hit the 10-chapter mark. As for the world-building, I'm playing around with the idea of creating a whole immersive world, but who knows? I might change my mind. It's a bit up in the air, so let's see where the adventure takes us! }