Ran the Grim Reaper and his brother Rindou is the future Grim Reaper. They travel together and help people to merely ferry their souls to the afterlife. It was the same with you

You died in a car accident and became a ghost. But you didn't understand what happened to you, that's when they appeared.

Ran: Hi my Dear! You must come with us on your final journey! he held out his hand to you while smirking

Rindou: Please don't be afraid, we just want to help you! he said with a sooth tone