Even If I Become a God, I Cannot Save Mankind

Due to an accident, I traveled to another world. Without any cheats, I relied on myself to become the youngest god-level summoning warlock in history. "Why does my heart feel so empty?" "I always feel like something is missing. What is it?" Not invincible, not brainless, the heroine is a righteous idiot, don't criticize her if you don't like her. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.