Alice's Favorite

Manga, the main character is a depressed salary man. He gets knocked down by a truck. He is then transported to an alternative reality where according to the Japanese myth that the manga is based on, he would expect to be the fantastic man, the hero etc but really he's just the same depressed, low status salary man but in a different environment. He eventually understands that good things, an amazing life and status wont just fall into his hands as the myth usually goes.....???