Incomplete, still under construction.
The Secret Ending of Mystic Messenger specifically refers to the Secret 01 and Secret 02 After Endings that is accessible after the player obtains 707's Good Ending. It focuses on more details of the backstories of V, Rika, 707, and Unknown, and reveals the rest of the entire plot details behind the events of Mystic Messenger, where Vanderwood plays a rather significant role in contributing to the plot as well.
In these episodes, the player will play the role of Seven's girlfriend.
Each Secret ending consists of 7 episodes, which will require 10 hourglasses each to unlock. As a result, the player would require 140 hourglasses in total to read the entire plot extension in Secret Ending.
Finishing Seven's route with Good Ending will leave Secret 01 unlockable. Secret 01 focuses on V and Rika's past.
Secret 01 picks up from where Saeyoung's good ending left off - chasing after Vanderwood who had mistakenly kidnapped Saeran instead of his original intent to take Saeyoung hostage instead. Meanwhile, Vanderwood converses with Saeran, who notes how Saeran and Saeyoung are nothing alike even though they're twins; with Saeyoung not being as serious as how Saeran is, and how Saeyoung always did crazy things as if he only had a day to live. As Vanderwood notices Saeyoung and the player's arrival at the scene, she mentions how the player will have to go down along with Saeyoung.
Saeyoung allows Vanderwood to inspect the inside of his car, while he checks if Saeran is unharmed. He tells Saeran he's glad that he doesn't seem hurt, before turning to Vanderwood and telling her to delete the server on his laptop herself if she wants. The player tells Saeyoung that she will accompany Vanderwood into the car, in which the latter questions her and says he will go instead. Vanderwood then interjects the conversation, choosing the player instead and threatening Saeyoung that he will harm the player if he does anything. Saeyoung replies with another threat, saying that he will blow the entire place up if something were to happen to the player. He urges Vanderwood to hurry up, before turning to Saeran and assures him that they will get out of this situation soon. He tells Saeran that he does not have to be on his side, and only wants him to be alive. Saeran replies coldly, saying how he will never approach Saeyoung for help even if he lives or dies. Saeyoung then knocks Saeran unconscious, saying he will put him to sleep for a while.
In the car, Vanderwood asks the player if they have implanted 'any funny device' there. Saeyoung contacts Vanderwood through the radio, and threatens to make him 'disappear from the face of the Earth' should he ever hold the player hostage. He tells Vanderwood that he will eventually be disposed of by the agency once the whole incident is over since he is someone who knows too much information. Saeyoung offers an escape chance to him, telling him that in the car there are new identification forms for her that are already registered in the national registry. While Vanderwood expresses her shock at how insane Saeyoung can be for hacking into the national registry, the latter tells her that this is the only chance that will guarantee his survival. It is implied that he is urging Vanderwood to trust him since he has left the player - the person most important to him - in his hands. Saeyoung tells Vanderwood that the car is bulletproof, before cutting off the radio intermission.
Vanderwood contacts the agency, requesting the boss for permission to approach Agent 707, with intentions to betray the agency, while noting how this might be a less painful way to die. Suddenly, she hears a commotion outside, with Saeyoung yelling at Vanderwood to bring the unconscious Saeran into the car. Saeyoung is then shot at his arm. Both then tell the player to lower her head and drive so that she does not get hurt.
The four then seek refuge in a nearby cabin, with Vanderwood noting how the bullet barely grazed Saeyoung. They are forced to stall for time in their hiding spot to prevent the agency from locating them. Vanderwood questions Saeyoung if it would be better to take the risk and be on the move, or even spread information about the agency online and let it self-destruct, before criticising him about being selfless and caring for the player and Saeran to the point that he would risk his entire future (by injuring his shoulders). Saeyoung thanks Vanderwood for deciding to help them escape; in which the latter replies he did it because she wants to get out of here alive. Just as Saeyoung tells Vanderwood to help him type and hack in due to the agency changing the algorithm, Saeran awakens.
Vanderwood explains the current situation to Saeran (while referring to the player as his sister-in-law, to which Saeyoung approves in amusement). He questions Saeyoung why he would always tear up whenever he sees Saeran, and tells himm how impressed she was when he took the bullet for Saeran. She expresses her puzzlement at why there is really bad blood between the twin brothers. Saeran then requests to go outside, claiming that he feels suffocated in their hiding place. Vanderwood warns Saeran not to go beyond the tree in front of the cabin in order to avoid detection. Saeran tells her that he will just stay outside (and requests for a cigarette in the process).
Outside, it is revealed that Saeran has taken one of their phones. He switches on the GPS and locates their current location, before making a phone call to Mint Eye to call for reinforcements. He expresses his deep hatred towards 'Luciel', saying he will have to pay with his life for tricking him throughout his entire life.
The next morning, Saeyoung does a double check with everyone else. He tells Vanderwood that the agency is upgrading their entire security system, which would make it harder to hack in in future. When he asks Saeran if he is hurt anyone, Saeran coldly brushes him off. Saeyoung hopes that he will eventually understand that it was V who was behind everything and not him all along. He expresses his determination to make Saeran understand the truth and not wanting to let go of him now that both of them are together again. Saeran tells Saeyoung to just leave him alone.
As Vanderwood asks about Saeyoung's injury, someone then knocks at the cabin door. Vanderwood asks if he should just start shooting when the door opens, with Saeyoung replying that no one can die here. Saeran opens the door, and demands the newcomer why he is here.
The episode starts with a flashback to when V and Rika first met. V approaches Rika at his photo exhibition because she had been standing there for over an hour. He asks her if she likes his photo and she tells him she loves it, so much so that she had to come back and get another look at it. Before V is able to leave she stops him to ask a question. Rika tells him that she feels as if her fears leave when she stares at his photos and then wonders if a world without fear would ever come. She then asks him if this is how he felt when he took his photos. V replies saying he doesn't have such thoughts but he wishes people like her feel love when looking at his photos.
V offers Rika the photo if she liked it. When she says she couldn't take it for free, V suggests that she could buy him a coffee in exchange afterwards. He tells her that he would like to hear more about her thoughts on his photography and how she views life. Then it goes back to present V as he talks to himself about not being able to see her now and says this is how he'll get closer to her.
After this, it goes back to the cabin where Saeran is demanding to know why the newcomer is here. The newcomer is revealed to be V. Saeyoung asks Saeran what is happening and Vanderwood works out that Saeran told Mint Eye where they were. V tells them that he's there to take them to Mint Eye.
Saeran continues to demand why V is here instead of the saviour. V finally gives him an answer telling him that the saviour chose him. He then tells everyone that he brought people to take them by force if they didn't comply. Saeran calls the disciples into the cabin.
While this is happening Saeyoung was sending their coordinates to the RFA chatroom but couldn't finish it because his arm wasn't moving properly and V noticed him. A believer/disciple comes in and shouts at them to drop everything or they would attack. Then the disciples arrest everyone who is not with them.
V tells Saeyoung not to forgive him and to remain as Luciel. He responds by saying that he would curse V forever. He was Saeyoung now, no longer 707 or Luciel. He claimed that he didn't need a name that was given to him by V or God.
Saeyoung then tells MC that he's sorry and will find them a way out. Saeran mocks him, asking what he could do with his injured arm. He tells Saeyoung that he will give him more pain at Magenta and that he has waited a long time for this. He's going to take Saeyoung to the woman who tortured them.
This also starts with a flashback of V and Rika but this time they're in V's apartment. V asks how Rika's therapy has been going. She replies saying that she only goes because V wants her to and that she actually fears that therapy is bringing out the vicious sides of her. Rika expresses the dark and empty feelings within her in detail and says that V wouldn't understand. V encourages her to tell him more about this side of herself because he loves her and wants to know more about her. She goes on explaining that she feels as if she is always pretending that she is normal in front of everyone but V.
Rika can't understand why he's weird and loves her despite knowing all her dark sides. He replies saying that he everything, even her pain, is beautiful to him and he loves it all. The only time Rika feels calm is when she looks at V's photos or when she's helping others but is frustrated that it's only temporary, she now feels that she can never let V . She tells V she feels disgusted with herself and that it comforts her to self-harm and offers to show him.
V suddenly grabs Rika's arms and tells her to stop. Rika struggles and resists, saying that even God can't help her. If he wanted her to stop then he would have to save her. He asks her to look into his eyes and let go of all the pain. Reassuring her that he will never leave her and that she wouldn't have to worry, Rika calms and starts crying. Rika realises that what she feels for V is in fact love. She feels as if V is the only one who won't be hurt by her, she finds him so unbelievable that she doubts if V is even real. V tells her she can test him by strangling, blinding or breaking his limbs and ensures that he will stay because he is her sun. Rika breaks down and begs V to save her, he is all she has left. V says that he hopes his love can save her and he will devote himself completely to her because he is her sun. She finally accepts this and tells him to never leave her.
We are then taken back to the MC. Saeran calls out to the savior then the game reveals an image of Rika sat on a throne. Saeyoung shows his surprise that Rika is alive and asks her questions about the situation. She simply ignores him and asks Saeran about the people tracking them. Saeran explained they were from Saeyoung and Vanderwood's agency and that he had taken care of them. Saeyoung realises that he had spread the info that he had threatened them with. He then turns to RIka and asks if she knew V had told them that she committed suicide. Again, she ignores him and tells Saeran to 'take care of them'. He replies saying that they would finally go through the entering ceremony. Saeyoung continues asking Rika questions but she leaves and Vanderwood tells him it's useless.
V calls out to Rika, asking where she is as he can't see her. Saeran tells him not to misunderstand because the savior has no interest in him. He goes on to say that being her ex-lover doesn't mean anything and that he should just be thankful he's alive. He then calls out to the believers telling them to take them in. One responds informing him that the savior wants to see him.
Saeyoung, Vanderwood and MC have been locked up. Vanderwood tends to Saeyoung's injury and expresses concern for his life. Saeyoung ignores her and tells MC he's sorry he couldn't protect her and that he'll get them out. He desperately asks Vanderwood if she has a hidden transmitting device or phone but she says no. He then looks around to see if he has anything to make a weapon out of. Vanderwood expresses her concerns for his life again. Saeyoung just dismisses it again saying that he's fine as he has someone to protect.
The conversation then switches to the savior. Vanderwood demands to know what is going on seeing as she is putting her life on the line. Saeyoung explains that she is the founder of RFA. He thought she died but it turns out she was Saeran's 'savior' and the leader of the organisation that he was targeting. Vanderwood asks about the coordinates he sent before and Saeyoung explains that he only managed to send the X coordinates but only an uncompleted Y. He continues to have faith that Jumin would be able to find them but unsure if he could do it in time.
It then switches to the chatroom. Yoosung worries that it's been hours since Seven has logged on and that he just sent a bunch of numbers. Jumin tells him that they were coordinates and he's searching for them. Jaehee joins in and says that it will take a long time though. Zen enters the chatroom and tells them that he had just seen that information from a secret intelligence agency had been leaked on the news. Jaehee leaves the chatroom to look into this information. They conclude that it could be Seven's agency because the timing fits.
Back in the Mint Eye building Saeran calls out to the Savior who brushes him off saying she's busy. He demands to know why V is still alive when he doesn't deserve to be close to her. She reassures him that she only needs V to test something. Saeran insists that he isn't worthy of anything as he's the one who lied to him for years. He asks if she still has feelings for V but she simply warns him to be careful of what he says and that he will destroy himself soon. She tells him that she has seen the future and V's has been set. Saeran accepts this and believes in her.
Finishing Secret 01 will leave Secret 02 unlockable. Secret 02 is mainly focused on Saeran's backstory and Seven / Saeyoung's attempts to rehabilitate and break through to him.
Saeran is brought to hospital, and has a flashback to when they were children, when Saeyoung was still by his side. The scene changes, and Rika is then shown brainwashing him to turn him against Saeyoung by making him believe Saeyoung abandoned him.
Saeran wakes, and becomes aggressive towards Saeyoung who had waited by his side.
In chat, Jumin and Jaehee are berating Zen's decision to send Rika to Alaska for therapy, although it is implied that they understand one of Zen's primary motives was to send Rika out of the country so that it is harder for the police to interrogate her.
Meanwhile, having made up with Saeran, Saeyoung invites the RFA members for an impromptu engagement party at his house, stating that he would propose to MC there. They arrive, and take a, as Zen puts it, family photo; with everyone from RFA, including the MC and Saeran; now with his hair back to its original red colour.