The protagonist, Y/N L/N, and his cousin Mayu were hanging around Y/N's apartment, with him helping Mayu as she was having trouble with math-related subjects at school. But suddenly, an incident happenned that threatened their lives and they were forced to rush out to the streets. After an inexplicable chain of events, Y/N and Mayu ended up in a dimension called Hyperdimension, meeting a few of the goddesses of a place called Gamindustri soon after their arrival. How will the two adapt to their new life in Gamindustri? Will they be able to return to their world on Earth someday? Disclaimer: I do not own anything from the Neptunia series nor any image or video that I use, those belong to their original owners. This is a "Hyperdimension Neptunia X Male Reader" type of story, which means that you, as the reader, will be the protagonist of this story. This here is my first time writing a book like this, if you have any suggestions for the story, feel free to write them down in the comments! I'm also publishing a Spanish translation of the story, "El Defensor de Gamindustri", which you can find on my profile! Anyway, I hope you all enjoy the story!

"Duel Monsters... An extremely popular trading card game with a very interesting bit of history surrounding its origin. The game itself has taken the world by storm, becoming incredibly well-known and played by many, many people who come from all manner of life." "There are millions of stories that have centered around this very game... And this so happens to be one of those many tales revolving around Duel Monsters." Join Azure Nile, an exceptionally skilled duelist with a strong connection to his deck and his friends, as he takes on his biggest challenge yet: Spreading his knowledge of Duel Monsters to the world of Gamindustri.

You are a high school student that is on break due to an accident. One night, you get bored and decide to go to sleep. Sometime in the dark you wake up to a strange noise and from then on your life isn't the same anymore. This may be a good change... or a bad one...

Soejammy: Hello everyone, and welcome to my story. I am your host Soejammy. In this story, you are sent into another world after a portal opens up and- ???: Hello everyone~! Soejammy: What in the holy shit?! Neptune: You didn't think I would do this, did you? Tee hee~ Soejammy: Seriously?! You couldn't wait until the reader is in the story?! How did you even get in my house Neptune?! Neptune: Sorry. That's my secret that you have to find out Mr. Soejammy. (Standing proud there with her hands at her sides) Soejammy: (Looks at her and face palms) Well, can't do anything with you always being able to break the 4th wall. I should have set up counter measures for this crap. Why I am not surprised, I will never know. Neptune: Because you are a fan of this series and know what to expect of the Protagonist of Protaginists~ Soejammy: Well even though you have your part to play, you're not the only protagonist this time Nep. Neptune: WHAAAAAAT?! Does this have to do with the reader in general!? How come when these fan fictions started happening, other people were seen more than me?! Soejammy: (Sweat drops as he thinks) *Is she serious?* (He shakes his head) Well, besides the point. This is my story I am writing. You will have your moments Neptune, but please be patient. Look, I will make you an offer. Neptune: Hmm, go on. Soejammy: If you behave and let the reader be in the spot light for being the main character, I will give you a ONE year's worth of pudding. Deal? Neptune: Hmm... Not bad Soejammy. You have a deal. (Shakes Soejammy's hand) Disclaimer: Soejammy does not own Hyperdimension Neptunia or materials used in general except for made up characters portrayed in this story. This story is a work of fiction that uses material not thought of yet to the best of my ability for which has inspired me to create my first story. All rights are reserved to the original owners and creators. Neptune and Soejammy: Please and enjoy the story! (Both wave to the readers)

Soejammy: What is up everyone, and welcome to The Guardian, Book 2. Neptune: Hope you all didn't miss us too long after the short break we had. Soejammy: So here's the recap: (Y/n) and his team have saved Neptune, Noire, Blanc and Vert, but Dionix ((Y/n)'s darker self) pulls a fast one and tries to detonate the base with the team still in it. Adult Neptune uses her Nep-Note to create a portal using Croire's powers to help the five still trapped in the room out. But something happens as the necklace reacts to the energy the portal makes. The portal goes nuts as it changes color and then moves to position under Neptune, Noire, Blanc, Vert and even (Y/n). They fall through the other side of the portal to where the four goddesses feel slightly heavier than before. Upon hearing a notification (Y/n) hasn't heard in a long time, Blanc notices that his phone has a signal again. After calling the first number he could think of, (Y/n) finds out he is back in his world with Neptune, Noire, Blanc and Vert for along the ride. What will happen when four goddesses are forced to live in another world in someone else's house? You'll have to find out. Disclaimer: Soejammy does not own Hyperdimension Neptunia or any materials used in general except for made up characters portrayed in this story. This story is a work of fiction that uses materials not thought of yet to the best of my ability for which has inspired me to create my second book for this series. All rights are reserved to the original owners and creators that belongs to them in respect for their work. Please enjoy. Neptune: So, will I be more of the protagonist in this story?? Soejammy: I might think about it, I might not. You have to be patient Neptune. And no, if you are about to throw another pie in my face... Don't do it. Neptune: *was ready to throw a pie until she was caught* You're getting better at knowing my tricks... Oh well. Soejammy and Neptune: Enjoy the next adventure! *Waves to the audience*

Y/N and everybody else is returning back to Gamindustri after solving the mystery of the appearance of monsters in Y/N's world. But a new threat appears whose aim is to destroy Gamindustri. But for what purpose? Will the CPUs and Y/N be able to protect Gamindustri from yet another crisis? (This is the 3rd season for my Hyperdimension Neptunia series. Hope you guys will enjoy!)

A year has passed since you left Gamindustri. During that 1 year, mankind has made a step forward towards the future. A new gadget has been invented; "ARC". One fateful day, you live your normal life... well, normally. Until a monster from Gamindustri appeared in your world. What will happen to you this time? Will you fight? Will you run?

Neptune: Hello everyone! You probably are wondering right now, "Hey, where's Soejammy?" Well... he's still getting a lesson taught to him by Sadie still for killing off her human counterpart, but I'm sure we'll see him sooner or later. For now, I'm here! A sign saying "Neptune is the greatest!" pops out of nowhere with flashing lights and fireworks go off for added effects. Neptune looks at the props she's placed and scratches her head. Neptune: Hmm... I think I went a little overboard... Maybe spending $200 of Soejammy's work money wasn't the smartest move on my part... But oh well! I'm sure he wouldn't mind. So let's see... Last time I remember, we had just finished off a big fight with Dionix and Johnathan in a fight, by which I mean (Y/n), due to gaining insane powers for some reason. After having a moment to regain his confidence and determination, (Y/n) has found a way to return us back to our world to continue what began six months ago in Gamindustri. What horrible things will we see? What foes might we face? And who is the mysterious armor guy that I peeked over on the Author's story?! Well, I won't know anyway. So I'll have him explain to me whenever. Now to the disclaimer, Sadie!! Iris Heart tossed in a beaten Soejammy and steps on him with her boot. Iris Heart (Plutia): This piece of trash doesn't own this franchise or Rooster Teeth on any material used in his books except for ideas of his own. His ideas are meant to show his love for the series in general. All respected copyrighted materials used here are strictly meant for fun and is all reserved to their original owners on their references, quotes, and songs that belong to them. Please help support their official release dates. Iris Heart looked at Soejammy and chuckled. Iris Heart (Plutia): Time for some more fun~ Iris Heart begins to drag Soejammy away as he screams for help. Neptune: And that's why I avoid making her mad everyone. Well, welcome to Book 3 and hope you enjoy the ride!

Nepgear and Uni decide to switch places to see how each other live their lives, but this leads to some unexpected outcomes.