I prepared for the future after returning to Seoul. First, I purchased an entire block of single houses in Hannam-dong. Then I began renovating their basements. I no longer knew the future, but I knew we didn’t have much time before most of the world transformed into the demon realm.

I designed the blueprint for an underground city with the help of Young Dwarf’s Dexterity. With [Buster Call], I summoned Genkelope’s Vessel and began construction using their maintenance ships.

The assembly quickly progressed because Yoo Yeonha lent me all of the required equipment. The ship’s crew also praised my top-notch blueprint.

“What’s this?”

Today, I brought Boss to the construction site. Jiing— Boss widened her eyes at a robot making parts with its laser hands.

“I’m building this place to prepare for the demon realm transformation.”

“Demon realm transformation?”

“Yes.”

We needed to prepare for the incoming crisis to achieve the happy ending everyone deserved.

“This is the crystal that can stop the transformation.”

I took out [Akatrina’s Purification Crystal]. Prihi, from the recorded past, had given it to me. However, its effects could only be used in a 5 km radius.

“This crystal can also purify the soil and air. We can easily produce...