God apologizes to fifteen-year-old Touya Mochizuki for accidentally killing him with a stray lightning bolt by offering a second life in a fantasy world, complete with enhanced strength, magical talent, and a working version of the smartphone that died in his pocket along with him. Touya sets off across a pseudo-medieval landscape with instant access to information nobody else in this world has, following whatever catches his attention rather than any set path. This is Patora Fuyuhara's original web novel, the basis for the later manga and anime.