Isekai wa Smartphone to Tomo ni.

A 15-year-old boy, Mochizuki Touya, dies in an accident involving lightning and is confronted by God, who admits to a mistake. Despite this, Touya is given the chance to be reborn in a fantasy world and retain his smartphone. He begins his journey in a pseudo-medieval setting filled with swords and sorcery. His adventure includes various experiences and unpredictable events as he moves from place to place, pursuing whatever interests him. The story unfolds with elements of friendship, humor, and unexpected twists.