What did I just do?

Lee Sangho only regained his sense after he entered the dungeon. The consequences of what he’d done only struck him after. He felt a rush of regret, but it was too late to turn back. Now that the barrier had formed, he had to find the Return Stone. 

Which meant he had to clear the dungeon. 

[No. If you accept my offer, you can get out of here easily.]

“W-who are you?”

[Koo-koo-kook.]

The laughter rang inside his head, and the hair on the back of Lee Sangho’s neck rose.

[If you want power, then come to me.]

Jeeeeeng.

In front of Lee Sangho's eyes, a red portal was formed.

It formed even though I haven't killed the basic monsters?

The portal that allowed access to the true high rank dungeon only appeared when all the monsters inside the subway station was killed. However, this time, the portal had formed as soon as he’d entered the dungeon.

To be precise, the mysterious voice had created it.

Unless Lee Sangho was an idiot, it was hard not to figure out what was going on.

This being is capable of controlling the dungeon.

He had no idea who this was.

He wasn’t sure if this being was a god, a devil, or an alien from outer space. However, he knew that this being could control the dungeon,...