I'm not dead, but I'm in another world.

When the protagonist woke up, he found himself in a bungee-jumping state without a rope above the forest. Together with Touma, a retired soldier and free spirit from Romanesalexios, one of the great powers of this world, he accepts requests from various places around the world while searching for a way to return to his original world. Who called him to this world, and will he be able to return to his original world?