A strange place is formed by purple flames, bricks start to come under the ground, and pure gold appears through the walls and pillars. As Yuki wakes up in this castle, black smoke covers the entire place, the boy can't see barely anything, he tries to walk through the corridor but he can't see the exit either the entrance. As the boy frustrates himself with that smoke, a strange voice comes from somewhere in the castle. While that voice is making an inaudible sound, Yuki can hear lots of people in a low voice, they are asking for help making the sound of suffering.
The boy tries to reach the voices of suffering, but there is a wall in front of him, he puts his right ear at that brick purple wall and the screams are getting louder. Yuki prepares himself to hit the wall, he tries to hit it with all his strength but it is no use. He prepares to do it again, but the black smoke starts to get even denser, he can't see anything, his body starts to get weak, and his skin starts to compose. He can't stand up anymore, but as he loses his strength, a shadow comes from the corridor involving him and entering the black ring. Green flames come from his eyes as the black smoke fades away. The boy stands up in relief, as a shadow comes at his right side and reveals to be Hades. The god comfortably looks to Yuki.
Hades: I am sorry to make you wait for so long.
Yuki tries to understand what is happening, all he can notice is that Hades is still with those bad emotions coming from him.
Yuki: Where am I?
Hades: Home, my home.
Yuki: DID I DIE?
Hades: Not yet, but if you spend too much time the shadows will consume you.
Yuki starts to get sweat as he looks around. The boy has so many questions but he can only think of one.
Yuki: Those screamings are coming from what and where!?
The god looks at him and orders him to extend his right arm, the boy does and the god forms a hand with the shadows, and with a finger that looks like a black dagger touches the black ring, and a strange purple glow comes from it.
Hades: Now you are capable of using god's authority. I will simply explain this, now you have the power to control my castle and use my arsenal. One day you will control all of hell if you get stronger.
The boy gets scared for one second, but before he can process everything he touches one brick in the wall, and all of them start to form a bridge at a lava pit. Yuki rushes to where the screamings are coming, and he sees thousands of white and red souls, all of them are so similar but at the same time different from each other.
Yuki: What the hell is this!?
Hades: When I was sealed in the ring, anyone was controlling hell, this means every single soul in this thousands of years, was judged properly.
Yuki: So everyone is suffering regardless of who they are?
Hades: That's why you have to control my powers, Yuki Nagisa, I know you didn't ask for this. Our time is ending. You have to go back now.
Yuki: Before that, Athena told me you don't have compassion. So why do you care about them? I think if I understand you, maybe I can be more powerful.
Hades: You are not as dumb as I thought. I want to help those people because this is what my love would have wanted.
Before Yuki can ask another question his soul is pulled out of hell, and he comes back to reality.