Arriving at the portal in Gangnam, Seoul, that led to the ancient ruins:

"The briefing is over. This entrance pass grants access for ten days in the Elf Ruins. Would you like to enter?"

As if they even needed to ask. Handing the entrance pass to the guide, who had been explaining about the site for quite a while, I nodded.

"Yes." "Pass confirmed. I hope you have a pleasant time."

Following the guide’s instructions, I stepped into the portal and was greeted by a vast, awe-inspiring expanse of ruins. Buildings reminiscent of medieval Europe stretched out in rows, most …