剧情:暗黑次元的海德
Taking place between chapters eight and nine of the VN, anime episode 18, in the gamma world line divergence 2.615074%, the drama CD follows Okabe when attempting to undo Ruka's D-Mail throws him into a far-removed world line. Okabe comes to from the effects of Reading Steiner to find himself in a dark alley and a bloodied man dead at his feet. In this world line he is a Rounder and many of his enemies and allies are seemingly reversed.
该广播剧发生在本篇游戏（VN：视觉小说）的第八章和第九章之间，即动漫第18集，位于伽玛世界线分歧2.615074%，故事讲述了试图撤销漆原琉华的D-Mail的冈部被扔进一条遥远的世界线。冈部由于Reading Steiner的影响发现自己在一条黑暗的巷子里，并发现一个满身是血的男人死在了他的脚下。在这条世界线，他是一个Rounder，看起来他的敌人和盟友似乎都反转了。
Okabe discovers that here he is a Rounder, codename M3, and has long been partnered with Kiryuu Moeka. The two have just completed a mission to kill Europol agents, who had uncovered their identities. Nothing makes sense to Okabe. When he notices that Moeka is able to talk normally with him in this world line, he realizes that the world line divergence has changed drastically. He runs to the lab to send another D-Mail, but runs into Makise Kurisu and Amane Suzuha. Though shocked that Suzuha is there, things become even worse as Kurisu had witnessed the Rounder Okabe killing the Europol agent. Suzuha is clearly hostile, since her reason for time traveling in this world line is to save Japan from future Okabe's evil. Kurisu begs him to stop, "reminding" him that Mayuri does not have much time left. Things escalate when they do not believe that he just arrived from another world line and Kurisu begins to call the police. However, Moeka rescues him with a stun grenade. After running away, Okabe stunned, moves to go see Mayuri. Moeka, who had heard Okabe's conversation with Kurise and Suzuha, calls FB and tells him that the machine is confirmed to be a time machine, as M3 said so.
冈部发现在这里他是一位代号是M3的Rounder并且和桐生萌郁搭档了很久。他们俩刚完成了暗杀一位知晓他们身份的欧洲特工的任务。所有事情对冈部来说都很不合理。当他注意到萌郁在这条世界线可以普通地与他说话时，他意识到世界线变动率彻底地改变了。他冲向Lab，想要寄出另一封D-Mail，但是他在路上撞见了牧濑红莉栖和阿万音铃羽。冈部因铃羽的在场而震惊，而且事情因为红莉栖之前目击到Rounder冈部杀死欧洲特工而变得更糟。铃羽很明显地敌对冈部，因为她在这条世界线时间旅行的理由就是从未来冈部的邪恶统治中拯救日本。红莉栖求冈部不要再这样做了，同时“提醒”他真由理的时间已经不多了。她们不相信冈部刚从另一条世界线RS到这条世界线，而且红莉栖开始叫警察，事情不断恶化着。然而，萌郁用一颗震撼弹救下了他。冈部逃走之后，（对发生的事）惊呆了，动身去看真由理。听到了冈部与红莉栖和铃羽对话的萌郁打电话给FB告诉他说正如M3所说，那台机器确实是一台时间机器。
Entering Mayuri's hospital room, Okabe sees Urushibara Ruka is there as well. More and more things are clearly different from the Okabe of this world line being known to drink Mountain Dew to Mayuri calling Okabe "Okabe-kun". Okabe tells Mayuri that he has no memories of this world line and asks her to tell him how they know each other. Mayuri, though confused, tells him that they were childhood friends but after the Y2K crash their parents died and they were separated for seven years. Upon discovering that Mayuri is dying of cancer, Okabe leaves to clear his head on the hospital roof.
进入真由理的病房后，冈部看到漆原琉华也在那里。越来越多的（冈部记忆中的）事情与这条世界线的冈部有明显的不同，例如喝Mountain Dew（激浪）以及真由理称呼他为“冈部君”，冈部告诉真由理他没有这条线的记忆并且让她告诉自己他们怎么认识彼此的。尽管感觉很迷惑，真由理还是告诉他他们是青梅竹马，但是在千年虫事件之后他们的双亲都死了，他们也被分开了7年。发现真由理身患癌症即将死去之后，冈部离开到医院屋顶来清醒一下头脑。
Ruka finds him there and confronts him with what he just heard from Kurisu. Moeka appears and confirms the truth saying there is not point in trying to hide it longer. Once Ruka leaves, Okabe laments that everyone is leaving him and it is his fault, since he carelessly messed with time. He is unable to accept that others are still suffering because of his mistakes. FB calls and Okabe declares he is not a Rounder, but is told to go cool his head. Moeka tells him that Rounders can pressure the police so there is no need to worry about Kurisu's reporting him. However, they need to go into hiding. Okabe tries to reject her. He blames her for killing Mayuri and betraying them, but she replies that they have done numerous missions together and he has saved her life many times. When he tells her that was a different "him", she replies in kind that the "her" he speaks of is also a different "her". She wants to help him and presses him to hide at least until tomorrow.
琉华发现冈部在屋顶上并用他从红莉栖那里听到的事情与他对峙。这时萌郁出现并确认了事实，她说已经没有必要再试图隐瞒真相了。琉华一离开，冈部就感到非常悲伤，因为所有人都在离开他而且这一切都是他粗心地乱搞时间的错。他不能接受其他人因为他的失误而受伤。FB打电话过来，冈部声明他不是Rounder但是被要求去冷静一下脑袋。萌郁告诉他Rounder可以对警察施压所以不用担心红莉栖的举报。但是他们需要隐藏起来。冈部试图拒绝她。他指责萌郁杀死了真由理并且背叛了Lab，但是她回答说他们已经一起完成了大量的任务而且冈部已经救了她很多次了。当冈部说那是一个不一样的“冈部”时，萌郁同样回答他他提到的那个“萌郁”也是一个不一样的“萌郁”。萌郁想要帮助他并且要求他至少隐藏到明天。
They arrive at her apartment. She offers him kebab that they apparently always ate together. He asks her why she is still coming near him. She acknowledges that the person he is now is different than the Okabe of this world line. However, she still feels like his true nature has not changed. In this world line, Okabe saved her when she tried to commit suicide and told her to become a Rounder. He is like family to her, and she wants to help him. Okabe still pushes her away.
冈部和萌郁到达了她的公寓。她供应了他们很明显经常一起吃的烤肉。冈部问萌郁为什么她仍然靠近着他。她承认现在的他和这条世界线的冈部不一样。但是，她仍然感觉到他的本性没有改变。在这条世界线，冈部在她想要自杀的时候救了她并且让她成为了一名Rounder。冈部对她来说就像一位家人，而且她想要帮助他。冈部仍然拒绝了她。
The next day at 12:02PM, Faris Nyannan arrives at the lab where Hashida Itaru, Suzuha, and Kurisu are. Kurisu wonders what Okabe meant by coming from another world line. Suzuha tells them that the multiple world lines are constantly changing. However, it is impossible for a person to be aware of it. Faris thinks, however, that Okabe might have a special power that allows him to remember other world lines and wants to test him with her ability to see through people's lies. Suzuha warns her against getting close to Okabe and reveals more about the horrors of his dictatorship in 2036, as the leader of the Rounders, member of the Committee of 300, Hououin Kyouma. He killed her parents, friends, and mass-murdered many others. As a member of the resistance against him, she suffered a major wound to the back herself. Suzuha wants to destroy the Phone Microwave before Okabe can steal it. However, Kurisu is hesitating. While she always found Okabe cold, he was kind. The Okabe she saw murder a man was not the Okabe she knows. However, the Okabe right after that was completely different person. She had never seen Okabe with such a sad expression before.
下一天的12:02PM，菲莉丝喵喵到达了桥田至、铃羽、红莉栖在的Lab。红莉栖想知道冈部说的来自另一条世界线是什么意思。铃羽告诉他们各种各样的世界线一直在变化着。然而，不可能有人知道世界线变动。然而，菲莉丝认为冈部可能有让他可以记住其他世界线的特殊能力，并且想要用她的能够看穿他人的谎言的能力来测试他。铃羽警告她不要接近冈部，并且透露了更多在2036年他作为Rounder首领、300人委员会的成员、凤凰院凶真的恐怖独裁。（铃羽说）他杀死了她的父母、朋友并大规模屠杀了很多其他人。作为反抗他的抵抗组织的一员，铃羽自己背部就有一道很严重的伤痕。铃羽想要在冈部偷走电话微波炉之前毁掉它。但是红莉栖犹豫着。尽管她一直感觉冈部很冷漠，但是他还是很和蔼。她看到的谋杀别人的冈部不是她认识的冈部。然而，那之后的冈部是完全不同的一个人。她从未看过冈部如此悲伤的表情。
Almost two hours later, Moeka approaches Ruka at the shrine. She asks him if his mother ever received a message on her pager with a future sent date. Ruka confirms that she did receive the strange sequence 2929831831 once and then once again about a month after. Not understanding the sequence, she showed the message to a company president friend of Ruka's father. A few days later, a SERN scientist who had heard about it came. This scientist later developed the vaccine program for the Y2k crash. Moeka reflects that SERN probably caused the crash since they had an antidote ready and under their control. This is something that bears investigating. In her thoughts, however, Moeka is at a loss about what to do after investigating. Okabe wishes to make this world line into something that never happened, meaning she will no longer be by Okabe…
差不多两个小时之后，萌郁在神庙接近了琉华。她问他他母亲是否曾在传呼机上收到过一封发信日期是未来的信息。琉华确认了她的确有一次收到了一个奇怪序列2929831831并在一个月之后又收到了一次。
Ruka begs her to not get in the way of Okabe and Mayuri's remaining time. However, Moeka warns him once again that Okabe is not the kind of person Ruka thinks he is. Ruka holds his ground that though Okabe is difficult to get close to he at least is very kind to Mayuri and visits her everyday. Moeka claims that behavior is just an illusion, but Ruka says that yesterday was the first time Okabe did not drink Mountain Dew he always does and seemed so sad. Moeka thinks that is true. Okabe is normally like an emotionless machine, but yesterday he seemed about to break down and cry. She wonders if it is true that he came from a different world line and if so, what she really should do.
FB calls and orders her to work with another Rounder team to take the time machine from the lab and secure the three scientists that made it and deliver them to SERN. Since Okabe can no longer be trusted, he is to be taken as well. Moeka begs FB to do something for Okabe. FB replies that she should make up her mind now, eventually advising her that if she is not prepared, then she should choose to do something she shouldn't and follow her feelings.
Moeka returns to her apartment and tells Okabe about their next mission. Okabe wants to run to warn them, but Moeka tries to stop him. If he turns against the Rounders, his life is forfeit. Even when she finally reveals that he is to be captured too, he refuses to stop. He tells her he cannot be killed anyway, since causality will prevent his death at least until the year 2036. When she tells him to quit joking around, he turns it back on her asking why she betrayed the Rounders by telling him about the orders to capture him. Declaring that he will not stop, that he has no attachment to this world line, he leaves. After thinking, Moeka decides to follow FB's advice to do as she wishes and chooses to keep Okabe from being captured by SERN, even though according to Okabe that means that her relationship to him will disappear. She runs after him. Okabe asks her why she wants to help him even though her life will be forfeit for betraying the Rounders. She declares that she is his partner and wants to be his strength. He tells her that he is a completely different man than the Okabe Rintarou who stopped her from killing herself and partnered with her in work. He asks if she still will throw away everything to help him. She says yes. Okabe is like a different person. However, as she told him yesterday, his true nature still has not changed. Also, she tells him that him calling her by her real name and not her codename like he always had done before, made her really happy. For the first time, Okabe truly accepts what she says and asks for her help. He names their strategy "Operation Dvergr", declaring that he will negate this world by turning into an evil dvergr.
In the lab, Faris, Ruka, Suzuha, Kurisu, and Daru are there, as Kurisu tries to prep the Phone Microwave in an attempt to go against the Rounders. Okabe and Moeka are outside. It took awhile to confirm the forwarding address of the D-mail Okabe needs to send, so there is only a half hour left before the Rounders are due to strike the lab. The 42" CRT is turned on, so they only need to break in past those in the lab to send the D-mail. Moeka preps a gun, and after a bit of hesitation on both sides, Okabe accepts it, though he has no intention to kill. Moeka advises him on using the weapon, and encourages him to not worry, she will prevent him from having to shoot. He asks her to not shoot as much as she can. Okabe decides to go in first, but is clearly shaking. Moeka startles him by giving him a kiss. She tells him that even if in the world he was in before they were enemies, here and now she is his ally and will be his partner even if the whole world turns on him, so he can rely on her. Okabe acknowledges that he trusts the her of here and now. Remarking that she wishes they could eat kebabs together again, she suddenly begins the countdown for their break in.
Okabe and Moeka hold Ruka, Faris, Daru, and Kurisu at gunpoint. Though Kurisu tells Okabe she misjudged him, he steels himself to tell them all to kneel, facing the wall. Ruka tells him he looks so sad. When he says he is not, Faris can tell that he is lying. However, he assures them that he is serious. Suzuha dashes out to attack him and disarms him and threatens him to keep Moeka from shooting. Before she can have them tied up, Okabe tackles her and with the gun Moeka tosses to him he holds Ruka hostage. Kurisu and Faris plead with Okabe to stop this, but he refuses. No matter what he will send the D-mail. To Ruka, who is absolutely terrified, Okabe assures in a whisper that if he does not resist, he will not be harmed. He gives Ruka a memo and tells him to input the information on it into the X68k computer attached to the Phone Microwave. Just as Okabe is about to use his phone to send the D-mail, a sniper from the other Rounder team fires, striking Okabe. Gunfire breaks out and protecting Ruka, Okabe is hit repeatedly. Within the shelter of the development room, Okabe is heavily bleeding and barely hanging on. Ruka is flustered and Moeka runs over. Okabe begs them to send the D-mail from his phone. Moeka agrees and wishes him well. Okabe thanks Moeka just before Reading Steiner kicks in.
A dream-like sequence plays out in which all eight lab members are at the beach, when Moeka suddenly says she wants to eat kebabs. For some reason she feels like Okabe might want one.
