Aira Yuukei, a tired boy from Japan ends up getting stabbed on his way to school. He later wakes up in a forest with no wounds left from his encounter. After wandering around in the forest, he stumbles upon a girl sleeping beside a campfire. After finding out that he had ended up in another world called Teyvat, the girl decides to introduce him to a person who may be of help. Aira decides to go with her but wonders... "What will happen to me now?" What types of adventures await Aira? Who will he meet along the way? And will he ever find a way home? Follow Aira as he finds his way through the magical world of Teyvat!