The Legend of Zelda: Ties of Darkness
The Secrets in the Netherworld Prison.
Hades Prison, in the Netherworld, Day One, local time is 07:55, Cell Block B.
The Netherworld prison Hades is this dark world's only prison, heavily guarded by 800,000 demons who are either guards or Prinny Instructors. It is located close to where low-class demons live, the proverbial slums, as you would call it. Prinnies are the souls of humans who have led useless lives when they were still alive, such as murderers and thieves. They are meant to pay off their sins in both the Netherworlds and the Angelic Realm of Celestia, but they must be trained in Hades to complete all sorts of tasks before being sent out to pay off their sins. Prinny Instructors are those who train the Prinnies in the tasks that they would eventually be given. The Guards are normal demons who flat-out make sure that prisoners don't escape, get fed at the appropriate times, can exercise, etc. This story's hero is none other than a high-ranking guard at Hades, Isidor Infernalsmith.
Isidor was at his shift in cell-block B when the prisoners started to act up in the cell-block's exercise yard. He calmly shouted at them from a window to quiet down, and all of them save for one felt obliged to shut their traps. The one who didn't, a ridiculously-sized Stalfos, shouted back, telling him to bring it. Regulations called for unruly prisoners to be put down and transferred to solitary confinement, so Isidor went down to the exercise yard and with little effort knocked out the Stalfos with a karate chop to the back of where the skeleton warrior should have had a neck. Isidor was relatively strong for just a high-ranking guard, and displayed insane amounts of courage when faced with immeasurable odds.
After the Stalfos was safe and locked up in solitary, Isidor continued his shift until he was transferred by the Warden to the Heavy Containment unit. The Warden of Hades was none other than the sorceress Veran, who Isidor despised. She had poisoned the previous Warden, an old spirit who went by the name of Charon, in order to get the position herself. Veran was also disliked by the other guards, the janitors, the technicians; even the Prinny Instructors hated her for proposing budget cuts and generally being unhelpful in already tough situations. Then at 11:50, she releases several prisoners from both the normal cell-blocks and solitary, many of them large pig-like creatures that had picked fights with the guards or octopus-like creatures that they simply didn't trust.
When these high-security prisoners were let loose, Isidor was standing guard outside of solitary cell #00, the Prohibited Cell. The Prohibited Cell, like other Heavy Containment cells, had to be manually opened via a combination lock from a control panel next to the cell itself as a safeguard against a widespread breakout if the Warden decided to release all the prisoners in order to lead a rebellion. As several of the released creatures fought with guards and other inmates, Veran was stopped by Isidor outside of the Prohibited Cell. The sorceress explained that she had released those prisoners as a distraction while the Netherworld's Government, the Corrupterment, ordered her to execute the prisoner locked up in the Prohibited Cell. Isidor listens to this and he states that it will not stand and pulls out a katana as both of them enter a battle stance. After ten minutes of fighting, Isidor stands victorious over a defeated Veran, still breathing but unconscious.
He gets ready to defend himself as three pig-monsters approach. Then suddenly a blur of white sped by and killed two of them and then it jumped into the air, kicking down the last one. The figure then became clear to Isidor's eyes that it was a Werewolf, and it tells him that the pig-monsters are known as Moblins. The Werewolf, a strong yet sweet in personality follower, assures Isidor that she is an ally. As if on cue, he stabs the last Moblin, which had just gotten up. The female Werewolf then tells Isidor her name: Valerie. She was wearing a white martial arts uniform and was equipped with a survival kit. Suddenly Isidor's curiosity got the better of him and punched in the Prohibited Cell's combination. The 4-layered door then opened, shedding light to what was held inside: it turned out to be just a girl wearing a very impressive dress.
Meanwhile in Kyoto, Japan, Earth; two men dressed in black are talking to each other about how demons are becoming quite the popular subject of video games like Shin Megami Tensei®, the Devil May Cry series®, and Disgaea®. One of the men is holding a newspaper that has the following top story: "Weird Monsters Attack Western US Town, Repulsed by Mysterious Heroes!" He then whispers, "So far these humans do not know just what is going on. At least these so-called 'Heroes' can't bother us because they can never work out how the Nexuses between human worlds and Netherworlds operate. Isn't that right, my Lord?"
The other man then said, "Yes, but those $* ! idiots might find out eventually, so we must keep a low profile. On the good side, the Japanese do catch and cook good sardines, plus I have not seen anywhere of this world that is outside of Japan. Besides, I have absolutely no idea as to how that lass reincarnated without becoming a Prinny. Yesterday she had just enrolled into the infamous Cromartie High School, unaware that she is just a frail rabbit walking into a lion's den. However this could be useful. We need to head out now. Something really nuts is going on with Hylia's Netherworld, and Emizel wants us to investigate the situation further."