A Light User in Teyvat

David was playing Genshin Impact on a stormy night, which ended up being the cause of his untimely death. What happened had a chance of happening so low that most people would consider it impossible; a lightning blasted through his window, killing him in the process. When David woke up, he was in front of a girl clad in a dress made of pure light. —Oh, my dear, you finally woke up— A new life in different world await David. How will he deal with the problems that will be presented to him?