autism

After dying as a result of God's mistake, the main character finds himself in a parallel world, where he begins his second life. His only possessions are the body that God gave back to him and a smartphone that works even in this new world. As he meets all kinds of new people and forges new friendships, he ends up learning the secret to this world. He inherits the legacy of an ancient civilization and works together with the kings of some very laid-back countries on his carefree travels through this new world.

A shut-in ever since he had a traumatic experience, Nukui Hibiki's biggest hobby has been using vocalization software to create and uploading songs online. One day, he receives an email from some fifth-grader girls, asking to meet and discuss something with him. The three girls, who have grown up together almost like siblings, ask him to help them show their gratitude to the people who have taken care of them. The method they've devised? Putting on a successful concert at a place full of memories.