Starting off with the aftermath of the defeat of the bugster, Kadoya reaching level 50, and for another bugster closer to the complete of Kamen Rider Chronicle. Katsujuro for some reason was with Taiga and Nico and they were at an amusement park in a haunted house which Taiga was scared and Nico laughs due to the fact that Taiga was freaked out mostly due to the ghosts and Katsujuro...yeah nothing the only thing that could possibly get him somewhat scared-ish is probably Plutia but knowing that it won't be a problem he didn't cared

Katsujuro: "So why are we even at an amusement park?"

Taiga: "Apparently there's a patient with the bugster virus here."

Katsujuro: "Why did you even listen to her?"

Nico: "Because my senses aren't wrong."

Katsujuro: "I bet 20 dollars your senses are nothing more than complete bull."

Taiga: "Ditto."

Katsujuro: "Also really Taiga you're that scared of ghost? Wow you're what in your fifties?"

Taiga: "Shut up. And i'm not that old."

Katsujuro: "Beg to differ with that hair style." Then he points at the strain of white hair which is hard for anyone to see unless they're blind or something

Taiga: "Do you have a death wish?"

Katsujuro: "No but if you keep yelling then I might have to put you in a retirement home."

Nico: "Dammm!"

Taiga: "Whatever just remember I can beat you any time of the month."

Katsujuro: "Yeah that's if you're faster than a bullet or even a turtle." And then suddenly the two saw a guy who was down and had some sort of orange pixel which was the bugster virus and both Taiga and Katsujuro were shocked and the two handed Nico twenty dollars

Nico: "Told you."

Katsujuro's thought: "God dam it! This is the last time I made a bet to any female because they have some sort of high percentage of luck."

Meanwhile

Kadoya and Ray were on the rooftop of the hospital and as Kadoya takes out his gashat and press the button

Taddle Quest!

as the chests were surrounded no buster appeared out of Ray

Kadoya: "What the?"

Ray: "Anything?"

Kadoya: "Nothing. I guess it must be something odd like the bugster must have escaped or something else." Then the two got a call from the game scope "Well we can deal with this later." Then the two went to where the caller was. Long story short it was Katsujuro

Later

Kadoya and Ray made it to the amusement park to find the bugster, Katsujuro, Taiga, and Nico already there

Ray: "Isn't that Vernier from Jet combat?"

Kadoya: "You might be right because honestly I have no idea." This was when Ray then went to take out his gashat but for some reason hesitate to transform because of what happened as such Kadoya takes out his driver and his gashat gear dual β and twist the dial to Taddle Fantasy which Fujikawa was watching from above

Taddle Fantasy! Let's going king of fantasy! Let's going king of fantasy!

Kadoya: "Proceeding to level 50." Then he inserts the gashat onto his driver and opens the lever

Dual gashat! Gachan! Dual Up! Tadoru Meguru RPG! Taddle Fantasy~! 

Kadoya: "Proceed-" Then Fujikawa hops off the rails of a roller coaster

Fujikawa: "Hold up I want to challenge you."

Kadoya: "And why is that?"

Fujikawa: "Well since we have the same gashat." He shows his gashat gear dual β "I want to see who'll win." Then he twist the dial to Taddle Fantasy as well

Taddle Fantasy! Let's going king of fantasy! Let's going king of fantasy!

Fujikawa: "Henshin." Then he press the button on the gashat and placed it onto his holster

Dual Up! Satan appeared! Say "Ma~ou"! Taddle Fatasy!

Kadoya: "Well then if you're in the way." Then he summons the gashacon sword

Gashacon sword!

Kadoya: "I'll eliminate you first!" Then he went to attack Fujikawa which the two were equal in power but Kadoya had the sword so it's questionable if it's even or not but it's not important after a few strikes dealt from one another Fujikawa was getting weaker and his attack speed slows down which Fujikawa took that as an advantage and takes the sword to use it against him

Fujikawa: "Looks like your body isn't used with that much time with that power of level 50." Then he pushes Kadoya aside as he takes his gashat and twist the dial to normal and Taddle Fantasy

Kimewaza!

Fujikawa then press the button and inserts it onto the holster

Dual gashat! Taddle critical slash!

Then he uses the sword to slash Kadoya causing his armor to disappear

Victory!

This ended with Kadoya laying on the ground still conscious as he gets up barley

Kadoya: "Dam it..."

Fujikawa: "You know you should try to find another player to let you use it." Then he twist the dial to normal and press the button causing his armor to disappear and shows it to Kadoya "You see Ryan didn't take your gashat but Katsujuro's. One side representing Taddle Quest." Then he shows the other side "The other Bang Bang Shooting." Then he teleported away as Ray went up to Kadoya

Kadoya: "Ray...give this to Katsujuro." Then he gives the gashat gear dual β

Ray: "What?!"

Kadoya: "You heard me very well intern." Then Ray walks up to Katsujuro and hands him the gashat

Katsujuro: "What the hell is this suppose to mean?"

Ray: "Look i'm confused as well but just take it I don't know why Kadoya want me to give it to you but just take it." Katsujuro then shrugs and he went up to the bugster as the bugster started to take aim but didn't

Vernier: "Out of Fuel! Temporary Landing!" Then the bugster went inside the person

Ray: "Well we should get him to the hospital."

Timeskip

After getting the boy to CR and as Ray talked to the boy whose name was Daisuke Egami and the two had a talk. Long story short he talked about how he has acrophobic (Basically fear of heights ). Ray which he felt a bit understanding of the situation talks with him

Ray: "Well then now then is there any type of stress you have that I should know?"

Daisuke: "Well you see I have a girlfriend and that she set up a date at the amusement park..."

Ray: "Well da-" Then suddenly Poppy pushed Ray to the side

Poppy: "Well then if you have a fear of heights then it's time to train you!"

Ray: "Poppy why the-"

Poppy: "Shush Ray." Ray sighs and decides you know what he'll help him just because.

Later

Ray was already getting sick and Daisuke was already shaking. Basically the two were on multiple fast rides and the last ride was a ferris wheel which was still making Daisuke in fear and Ray went to a trash can and vomits and that caught the attention of the "lovable" fourth wall breaking CPU Neptune who was dragging Kadoya and Katsujuro and as Blanc and Noire were following them

Neptune: "RAAAAYYYY!!!"

Ray: "What the?"

Neptune: "Come on keep moving!" She drags the two

Kadoya: "Why me?"

Katsujuro: "This is why I prefer to stay inside."

Neptune: "Stop being a downer!"

Kadoya: "There's a reason why I don't come near you because with you you're a dangerous person around. Blanc on the other hand at least she's calm."

Blanc: Then she takes back her man from Neptune "Thank you."

Katsujuro: Then he was free from Neptune's grip and went towards Noire "Also by the way Neptune try to drag me somewhere and i'll throw you into a trash can."

Neptune: "U-uh o-ok."

Neptune's thought: "So scary."

Kadoya: "Well then things lo-" Then he collapse onto the ground

Blanc: "Kadoya?!"

Katsujuro: "Looks like he used the gashat gear dual β and due to that his body was unable to deal with that much power." Then he carries him on his shoulder and takes him to the old clinic where he spend most of his days and as Blanc and Noire follows

Later

As they all made it to the old clinic and Kadoya was patched up he woke up still feeling the pain but Blanc was sleeping on his lap

Kadoya: "How did I-"

Katsujuro:  "Carried you here."

Kadoya: "Why the hell did you do that?"

Katsujuro: "I may be an ex-doctor but honestly does it look like I can care?" Then he shows the gashat gear dual β "I'll be using it but before why did you give this to me?"

Kadoya: "Look even an ex-doctor can change sure I may have been a douche but I know that deep down you still have something or someone that can get you-"

Katsujuro: "There's nothing that'll help me after what i've done about your mother and the other patients I have barley nothing to fight for. I'm doing this just because. No reason of kindness." This was a lie as he did it as more of something of Noire's option for him "Besides I should get going and you stay here and don't try to wake her up." He points at Blanc "She looks comfortable on your lap." Then he left and he got a call on his game scope "Well looks like i'm going."

Noire: "Have nothing left to fight for huh?"

Katsujuro: "S-shut up."

Meanwhile

How it happened it was so quick as Ray was face to face with the Vernier bugster and was attacking people and Ray puts on his driver but the field change and Ryan walks up like he's some god and as Ray was about to go into Mighty Brothers XX he was greeted with a warning from Ryan

Ryan: "Heh. Ex-Aid you should know that from the first time I told you about you being a survivor from the bugster virus should you go further you'll end up killing yourself and to lose what you have solely fought for!" This lead to Ray having doubt of wether or not he should fight as he does this because of how he was taught to save patients but what's the point if he dies. But this was when Katsujuro who walks up like he got out of a gun sling match

Katsujuro: "If you lead someone to doubting what you believe than you aren't that much of a doctor."

Ryan: "Dam you. You out of everyone you're a rouge, who followed nobody but your mentor. Plus you think you can beat me. Even if you use a dual gashat you'll just end up like Kadoya."

Katsujuro: "Don't compare me to Taiga I know what I decided. Plus after dealing with the proto gashat I was able to grow as a person." Then he has a backflash of himself 5 years ago using a driver and a old gashat

Ryan: "I'll eliminate you all!"

Katsujuro: "No you'll be eliminated first." Then he takes out the gashat gear dual β and twist the dial to Bang Bang Simulation

Bang Bang Simulation! I'm ready for battleship! I'm ready for battleship!

Then a battleship appears above him

Katsujuro: "This world needs one Kamen Rider and that will be me. Henshin." Then he puts on his driver and inserts the gashat onto his driver and opens the lever without hesitation

Dual gashat! Gachan! Dual up! Scramble da! Shutsugeki Hasshin! Bang Bang Simulatio~ns! Hasshin! (Dual Click and open! Dual up! Scramble out! Sally forth! Bang Bang Simulation! Go!)

Then it became an all out war as Vernier took things to the air and was shooting at him and not intentionally at Ray, Neptune, and Poppy

Katsujuro: "Mission start." Then he takes aim and started blasting some flying drones above which for him it wasn't hard to deal with

Poppy and Ray: "Snipe...level 50."

Katsujuro: "Hey Ex-Aid if you're not gonna do anything than give me your gashats!" Then Ray started to realize that he shouldn't let doubt cloud his mind as he press the button of his gashat

Mighty Brothers XX!

Ray: He puts on his driver "Henshin." Then he inserts the gashat onto his driver and opens the lever

Gachan! Level Up! Mighty Brothers! Futari de Hitori! Mighty Brothers! Futari de Victory, X!

Then he closes the lever

Ray: "D~a~i~ henshin!" Then he opens the lever

Gachan! Double Up! Ore ga Omae de! Omae ga Ore de! (We are!) Mighty! Mighty! Brothers (Hey!) Double X!

Then the three started to fight both Rays attacking Ryan and Katsujuro fighting Vernier and then Fujikawa shows up

Fujikawa: "A world where there's only one Kamen Rider that'll be lonely don't you think?"

Ryan: "Fujikawa!!!!" Then he pushes the two Rays aside and Fujikawa was so calm that he dodges his attacks

Fujikawa: "Miss. Miss. Miss. Miss." He knew what attacks he'll go for "And now you're next line is: 'Dam you stay still!' Am I right?"

Ryan: "Dam you stay still-" He gasp

Fujikawa: "It's time that I play." Then he takes out his gashat gear dual β and twist the dial to Bang Bang Simulation

Bang Bang Simulation! I'm ready for battleship! I'm ready for battleship!

Fujikawa: "Henshin." He inserts the gashat onto his holster

Dual Up! Enemy is coming! Shot down their Bang Bang Simulations!

Fujikawa: "Kamen Rider Para-DX Beta level 50 has arrive."

Ryan: "DIE!!!" Then he went to attack his attacks fail the lack of accuracy and Fujikawa was bombarding him with multiple shots and Katsujuro was surprised but wasn't gonna get distracted by a bugster with the same gashat

Katsujuro: "I'll end this now!" Then he closes the lever

Gachon! Kimewaza! Gachan! Bang Bang Critical Fire!

Then the turrets on his shoulders aimed right at Vernier and blasted a multi round amount of laser causing for Vernier to be defeated

Game Clear!

Ryan still dealing a 3 v 1 managed to gather the data of Vernier onto his driver and that was when they were about to end this as Rays closes his lever and opens it Fujikawa twist the dial of his gashat

Kimewaza! Dual gashat! Bang Bang! Critical fire!

Gachon! Kimewaza! Gachan! Mighty Double Critical Strike!

Then the three did a triple rider kick on Ryan causing Ryan's armor to disappear and for him to disappear and the same for Fujikawa and the stage disappear

Later

Ryan was injured and looks at his gashat

Ryan: "Fujikawa. You kept underestimating me. You see just because this gashat is called a level X meaning 10 there's another meaning X aka an unknown variable." He said that to himself and started laughing manically like usual

Meanwhile

After the fight was over Noire was hitting Katsujuro in the back

Noire: "You didn't defeat Ex-Aid! You failed!" She kept hitting him and that was when Katsujuro had enough and then turns around and then kisses her "Mmm!" She was surprised by it and this was when Katsujuro pulls her in closer and then stops kissing her "B-b-b-b-b-b-b-baka!!!"

Neptune: "...Another Level/Bonus chapter!" Then Ray whacked her with the hammer

Ray: "Dam it Neptune! Stop the fourth wall breaking shtick!"

Neptune: "NEVER!!!"