How to Retire as a Disaster Necromancer

Read How to Retire as a Disaster Necromancer / How a Catastrophe-Level Necromancer Retires
Han Ji-hyuck, the necromancer who saved humanity on the continent of Seron. He returned to Earth hoping for a peaceful and happy retirement, but from the very first day, his retirement plans went completely awry.
The protagonist, ‘Han Ji-hyuck,’ who had turned twenty, was summoned to the continent of Seron by a wizard named ‘Teros’ and lived his life as a necromancer. After many years passed, Ji-hyuck, who had defeated the Demon King, returned to Earth, but due to the laws of causality, the Earth he returned to was no longer the one he remembered—now filled with Gates and monsters. To make matters worse, the treasures he had brought back with him had vanished. Left with no choice, Ji-hyuck became an F-rank Awakener and began earning money.
When will Ji-hyuck finally achieve the retirement he so desperately longed for?