Tokyo Kingdom

A whole year has passed after the Chaos Arena is destroyed by Biollante, everyone in Japan deemed the masked stranger or Kenji as a savior or an enemy. The demons were feared by him due to his powers and the appearance of titanic monsters but no matter where they hide, he always finds and kills them.

At night time in the darkest part of city, the group of orcs called the Black Orc Tribe was ambushed by Kenji, in his Krystalak form, and kills them all but only leaves the one orc name Dogle, who was shocked and paralyzed in fear that this creature killed them before it set his eyes on the last one.

"Please, don't hurt me whatever you are." He pleaded before Kenji shoulder ram him against the wall.

Kenji threw the sharp crystals from his tail, impaling his body and pinned him against the wall.

"Where is Edwin Black?" He demanded as turned back to monster prince form.

"I don't know." He grunted.

"Liar, you piece of shit!" He snapped, gripped his throat. "I caught a whiff of vampire scent from you. You will tell me where he is."

"I told you, I don't know where he is!" He replied, panickily. "What do you think Asagi would do if she finds out you threatened me? I would never betray him!"

"No?! Then she should know better not to trust a demon like you!" He spat. "You and your kind should've stayed in that underworld where you belong, just ask your brother, Byg when I killed him."

It shocked in realization that it wasn't Asagi who killed him, it was this human or monster whatever he is killed his brother.

"Too bad he doesn't CUT it for me and if you don't tell me where he is hiding, I think I might have some dinner."

"What?!" Dogle yelled.

The Monster Prince shapeshifted to a giant plant monster with the face of crocodile, filled with lots of teeth in his jaws before glaring down at the orc.

"GRRNK-REEEARK!" He bellowed, ensnaring Dogle, along with the orc corpses with vine tendrils and hold them up above him.

"AAHH! Don't eat me! I'm sorry!" He screamed as Kenji opened his jaws and drops them in his mouth.

He chews them all up and swallows them in his stomach and couldn't imagine that those demons actually tasted good. He shapeshifted to Kamacuras and zipped fly back to his apartment.

As the summer hits this season, Kenji was training with Tatsurou since the boy asked his permission to train him when he deemed him to be the strongest and powerful ally. The Monster Prince conjures the Jet Jaguar as his sparring partner to train while shifting to Titan Crawler, hoping that the boy would get stronger and have what it takes to protect his girlfriend.

Rinko, however, heard about Kenji from Sakura that he fought in Chaos Arena for their mission and was killed by Edwin Black but revived in his berserk state and attacked him, savagely before Edwin got away. At first, she thought that he was dead but was relieved and glad that he lived again, especially Shiranui, who was worried about him the most.

As for Ingrid, she took a job as a new teacher at Gosha Academy, teaching the students, training the Taimanins next generation, and assist Kenji whenever he was hunting the demons while interrogating them the whereabout of Edwin Black and destroying their brothels with kaiju.

At home, Kenji painting the portraits of the kaiju he saw in his dreams from the other night. The portraits that he already did and hang on the walls or windows was MUTO, the ancient parasites, Behemoth, the jungle restorers, Scylla, the armored mollusk, Methuselah, the mountain that walks, Amhuluk, the demon of pestilence, Tiamat, the giant sea serpent, Leviathan, the sea monster of Loch Ness, Baphomet, the horned goat of the Sabbath, Sekmet, the large panther of Egypt, Mokele-Mbembe, African river demon, Yamata no Orochi, the eight-headed serpent worm, Typhon, the father of all monsters, Bunyip, the river devil, Abbadon, the angel of the bottomless pit, Na Kika, the kraken, and Quetzalcoatl, the feather serpent god while Kenji is painting the kaiju called Camazotz, the king of the deep.

As he was about to finish painting of it, he heard his phone rang. He puts the painting brush down and answered the phone.

"Hello?" He answered.

"Hey, Kenji. It's Sakura." She said, from her end.

"Oh, hey Sakura, what is it?" Kenji asked.

"We have a mission and big sis and I need your help." She requested.

"What is this mission that you wanted me to help you?" He asked.

"We'll tell you when you come. Meet us at the helicopter tonight. Bye Kenji." She hangs up.

"Hmm…" He growled before morphing into monster prince form.

Before he left, he wrote a note to Ingrid that he left to go to the mission with Sakura and Asagi and flew out of the pool area.

At nighttime in the helicopter, Kenji was briefed that the mission was given by Principal Yamamoto and Kuroi Yatsu, Muraski's older brother, that the Taimanins went missing on the isolated island called Tokyo Kingdom when they were investigating a mysterious Chinese terrorist that opposed Nomad called Ryuumon. Much to Kenji's displeasure, He felt that the monsters inside him was urging him to kill them all when the city was populated with criminals and demons alike.

When they arrived on the island, they slide open the helicopter and jumped out of it. The Igawa sisters used parasail to land while Kenji dives down and glide his wings to land somewhere.

As they land, Asagi took out the orc by slicing it before jumping up, flying kicked another orc, and cutting off its head. Sakura kills two orcs while Kenji, in his Wolfman form, pounced on two more orcs before ripping their heads off and bites on another orc in his neck to rip the chunks out.

"Kenji, you head over to the district and find out what they know about them." Asagi told him.

Kenji growled softly, knowing that he wanted to make sure that they'll be okay on their own.

"Aw, it's okay, Kenji. We'll be okay." Sakura assured, touching his mask. "By the way, that form you took on looks really cute on you."

He snorted and howling at night before heading off for kill and interrogation.

"I hope he's okay." She said, concerned.

"Don't worry, Sakura." Asagi assured her. "Knowing him, he's on the hunt for Edwin and kills demon for slaughter."

Suddenly, she senses something and looked back.

"A distinct aura," She said. "A Taimanin?"

"So, our ally?" Sakura inquired.

They spotted a young girl, wearing a Taimanin uniform, with short pink-hair.

"Saya. My name is Saya." She introduced herself. "Asagi and Sakura, I presumed?"

"Why do you know our names?" Sakura asked.

"That's because… You're the ones I have to avenge Lady Oboro from!" Saya exclaimed.

"Oboro, you say? I thought Kenji killed her!" Asagi shocked.

"I don't who is this Kenji is, but you're the ones that she wants." She said.

Suddenly, she started glowing with fiery aura as her skin color turns blue, and she gains spider legs and body as well as tentacles on her back. Her eyes also turn black outside of yellow or red pupils.

Asagi and Sakura were intimidated by her demonic appearance.

"A fiend." She hissed.

"I'm not very fond of spiders!" Her sister cringed.

"How terrible!" She said. "This form you see… came from tapping into the powers of a Taimanin!"

"The powers of a Taimanin?" Asagi questioned.

"Even both of you can transform!" Saya exclaimed.

"Me and big sis?" Sakura questioned.

"Stop such foolish nonsense!" Asagi yelled.

"You don't know? Even though it's about your own selves?" She sneered. "Then let me teach you all about it. All about the powers of a Taimanin!"

Saya's eyes started to glow red.

"Holding Crisis!"

She unleashed her tentacles upon them, restraining them for experiments as they were trying to get out.

"Kenji, help me!" Sakura cried.

Meanwhile, Kenji was in the bar, slaughter all the criminals and interrogating the last one, demanding the missing Taimanins and Edwin. The scum doesn't say anything, too afraid to tell so Kenji gutted his gizzard and stabbing him.

He went to brothel and kills all the demons and interrogating the last one, demanding the same thing. The last demon yielded the same result.

Kenji went to another brothel, and sees the group called Ryuumons. He caused a blackout by emitting a EMP burst and kills all the Ryuumon members before jumping on the last one, stabbing his shoulder.

"AAUUGGGHHH!" He screamed as the stone sword digs in his shoulders.

"I will ask you once, What is the connection between the Nomads and Ryuumon?" Kenji demanded.

"I won't… tell you." He coughed blood.

Kenji then stabbed his other shoulders, making him scream some more and grabbed his neck.

"If you won't tell me, I'll have to peek in your mind." He snarled before pressing his forehead against his crystal forehead.

As he peers into a Ryuumon member's minds, his eyes widen when he sees a familiar woman with purple hair.

"It can't be… OBORO!" He roared as he ripped his head off in anger and crushes it before storming out of the bloody bar. "Impossible! I killed that demon ninja bitch in that bloody arena! I'll killed her! I'll kill them all!"

He vented out all his anger until he heard something.

"Kenji, help me!"

"Sakura?" He gasped, recognizing her voice.

He shifted himself to Bunyip and headed back to where he left them.

When Kenji arrived there, he couldn't see Asagi or Sakura anywhere.

'Where could they be?' He thought, trying to sniffed their scent and noticed the third scent. 'That smell…' He sniffed. 'It's almost… demonic.'

He sniffed as he noticed the trail and followed it, hoping he finds them soon.

Kenji curses himself, he promised to Kyousuke that he will watch over them but he couldn't believe that this was all a trap for them but not him. He won't rest or stop until he finds them and kill Oboro but this time, Kenji will make sure that she stays dead.

As he reaches to where their scents might be, he founded the lab with all the pods and controls as transformed into MUTO and walked to investigated the lab. He noticed the lab records that the missing Taimanins were experimented and presumed dead but one of them was able to turned into demon form anytime. It also said that they were cloning the Taimanin to set up a trap for them and sold them to this Chinese Union. He growled before he follows the scents as he sees something in the tube as if they were creating something before generating an EMP burst to knock out the electricity.

'Asagi and Sakura were definitely been here, but for what?' Kenji thought, questionably.

He sees something glowing in the room and found the room that was covered in meat and everything. He smells their scent and growled that they've been here before he got here. He made a crackling sound as he transformed into Destoroyah.

"REEEEEEEKREEEAK…!" He roared before destroying the meat room with Oxygen Destroyer Beam.

He headed back to the lab and destroys everything and all research files, making sure that they won't make a clone ever again, including a capsule tubes. The Ryuumon members came in to see the what's the commotion and found him, destroying all the lab.

"What the hell is that?!"

"I don't know, but its destroying the lab and everything!"

"Lady Oboro is not gonna be pleased when she hears about this!"

Hearing that name makes Kenji really angry before he roared at them. He dividing himself into five Aggregate Forms and kills all the Ryuumon members before reforming to Perfect form. He morphed back to his Monster Prince form and conjures Yamato no Orochi.

"Destroys this hideout!" He ordered it.

"HHHIIIISSSS!" It hissed before the giant snake kaiju proceeds destroying the hideout and lab.

'Kenji, where are you?'

'Help me!'

Kenji heard their voices and runs while follows their scent.

"Hang in there, you two! I'm coming!" He said while running.

He also conjured a Giant Octopus before ordering it to take down the Tokyo Kingdom bridge, making sure no one leaves this island. He plans to kill them all, be it demons or human criminals because everyone on this island is going to die here.

At the abandoned building, all the demons and human males are gathered here before the doors opened, revealing Oboro and Saya.

"Lady Oboro!"

"Oboro, oh our high leader!"

"Everyone, thank you for gathering." She announced them.

"Come Asagi and Sakura. Over here." Saya called, pulling their chain.

Behind them was Asagi and Sakura, who was chained and blindfolded with their breast exposed to them after their body was remodified.

"Those woman… could they be Taimanin?" The demon asked.

"Yes." She replied. "They are indeed our sworn enemies, Asagi Igawa and Sakura Igawa." She motioned them. "Behold this form well and the one who defeated them is Ryuumon. No, they willing submitted themselves to me!"

"Looks like they've already drenched in white!"

"It's cum!"

"The Taimanins are drenched in semen!"

While they were looking at them with perverted looks, someone grabbed the demon from behind without Oboro or anyone noticed and slit its throat while muffled its cries. Kenji shapeshift into a demon after sucking its blood.

"From now on, they will serve us as prostitutes." Oboro declared. "Come now, greet all of them."

"Here, stand in front all of them." Saya ordered, pulling them in front of the crowd.

'Oh my god, what the hell did they done to you two?!' He thought, shocked while watching them.

"I'm Asagi, the newbie slut." She said, reluctantly. "I've been modified for pleasure. My breasts and nipples are also modified to work as sex tools. Anything goes, twenty thousand yen per person."

"That's kinda cheap!"

"Modified? In what way?"

"I plan to take further modification training in order for my nipples to feel further pleasure." Asagi said. "Everyone I hope we can all get along."

Everyone cheers while Kenji remained silence and frowned at them with disgusted looks.

"Come on now, its your turn next, Sakura!" Saya called her.

Kenji is horrified to see his girlfriend like this.

"I'm Sakura, also a newbie slut." She introduced herself while facing down. "Modified for maximum pleasure. Anything goes, and it's fifteen thousand yen per night."

"Raise your face more!"

"I can't see!"

Sakura raised her head up, facing the crowd.

"I've been trained to consume only semen." She said, shyly. "Also, I can climax with my throat and in my mouth pussy. I'll work hard, so I hope we can get along."

Kenji gritted his teeth that her girlfriend and sister was turned into nothing but broken slut, just like what happened to Shiranui while everyone cheered.

"Seemed everyone is cheering." Sakura remarked.

"Mistress, shall we move on to the next step?" Saya said, pointing at the pillory.

Oboro smiled before Asagi and Sakura was is locked in the pillory as their blindfold was removed.

"I shall now leave these two Taimanin here for three days straight." Oboro declared as the Igawa sisters looked each other with concerned while Kenji gritted his teeth in anger. "Complete this punishment, and you shall be forgiven. I shall then award you full citizenship within the Tokyo Kingdom as official hariots!"

Everyone cheered while Kenji remained silence.

"Big sis…" Sakura concerned.

"I'm sure Kenji will come soon." Asagi assured her. "So don't lose. Hold on until the end."

"Okay." She said before Oboro leans at her sister.

"Can you still stay sane after getting raped continuously for three days with that modified body of yours?" She sneered at her. "It'll be troublesome for me if you don't break soon, you know."

Saya groped Sakura's nipples, who squirmed by her touch.

"Because so long as the consciousness isn't destroyed completely, we won't be able to awaken the power of those genes."

"Karma will definite bite your hand and your demonic action!" Asagi cursed her. "Kenji will come and kill you again!"

"Oh, who is this Kenji person you just said?" She asked. "Whoever he is, he'll never make it in time before you'll be completely reborn as soon as the process completes. I shall make sure your body still remains as lovely as it is. Why don't break yourself down completely?"

It made Kenji and Asagi glared at her as the Monster Prince had enough before dropped his disguise and teleported behind Oboro, surprising Saya and everyone.

"Kenji!" Sakura cried.

"You-" She turned around but he grabbed her back of the neck and start stabbing her body with his stone sword repeatedly while she was screaming in pain until she bleeds out her body.

"I thought I kill you in that bloody arena, you bitch! You should've stayed in hell!" He snapped before throwing her at the wall.

"Mistress Oboro!" Saya cried.

"And you!" Kenji clamped her neck with his pincer tail and brings her closer to his face. "You were in this as well!"

He kicked her hard in her stomach to the walls, shocking everyone.

"No way, he took down Oboro and Saya!"

"Who the hell is that?"

"What the hell is he doing here?!"

Kenji turns and glares at the demon crowd before standing front of Asagi and Sakura and took his mask off, showing his black scale face with his jagged jaws and burning amber eyes as he growls at the demons.

"His faces? He's not human or demons!

"It can't be… it's him! The one who hunts and kills all demons!"

"That's Kenji, The Prince of the Monsters!"

"And it's us he wants to kill!"

"And this is where you all going to die here!" Kenji yelled, puts his mask back on before turning into his Titan Crawler and raised the crystals walls to block the exit, preventing them from leaving. "And don't think about leaving! You might as well enjoy it last because I might cause some bloodshed on all of you!"

The Monster Prince growled at them that puts them in fear as his marking is flaring up while his hair is spiking before he charges in for kill by ramming his tusk, clawed those wretched spawns of the demon world, breathed Atomic Breath or any other breath attacks, or ate their inner guts whenever he feels hungry while Asagi and Sakura watches him, killing all the demons like he was a wild animal that kills whatever he sees.

As the night falls, he was covered in blood after killing all the demons in the area before de-morphed back to his human form, feeling tired before went to the Igawa sisters. He breaks them out from the pillory, ripping out the chain collars and hold them close to him.

"You're alright?" He asked them.

"Hugh…I…need…" Asagi panted while dazed from aphrodisiac effect.

Suddenly, she grabbed his face and pressed her lips against his, shocking Kenji while roaming her tongue in his mouth.

'Forgive me, Kenji...but I needed you to have sex with me to make it go away.' Asagi thought while kissing him before rubbing his groin, making him flinched.

"Big sis, I wanted to kiss him!" Sakura whined while feeling dazed, grabbing his face away from Asagi. "He's my boyfriend now."

She kissed him, shocked Kenji as well while roamed her tongue in his mouth as well while rubbing his groin.

'Yep, both of them are definitely under the aphrodisiac effect but I can't imagine what did ninja demon bitch do to them.' Kenji thought while feeling his member is acting up from her touch until Sakura parted her lips from his.

"Sorry, Kenji but… I need you inside me." She panted before falling asleep.

"Maybe after we… get out of this infernal place." He said, blushing but shook it off.

"You…" He turned to see Saya, who was recovered by his hard kick. "You hurt Mistress Oboro!"

"Oboro-smoro! She must die, kid!" Kenji snapped at her. "And you can join her too!"

"I'm gonna kill you, Monster Prince!" She yelled.

"Oh yeah, and what are you gonna do about it, you little brat?!" He dared before sniffing the scent from her. 'That smell... could she be that...?'

Suddenly, Saya turned into a spider demon that she used to capture Asagi and Sakura, surprising Kenji, who quickly morphed into his monster prince form.

"What the hell...?" He gasped while frowning.

"This is my demon form... tapped into by powers of Taimanin." She sneered. "And you'll pay for hurting Mistress Oboro."

"So this is your demon form, huh?" He scoffed, putting them in the crystal cage. "Not impressed, but let me show you what this power is."

Kenji changed into Spacegodzilla form, surprising Saya.

"What...is...that?" She asked, shocked.

"SKREEEEEARRNT!" He roared as the crystals roses from underground, giving him more power.

Saya shot her tentacles at Kenji, who countered them with Corona Beam, obliterating all of them and hit Saya.

"You big bully!" She yelled as Kenji screeched at her.

Saya charged at him and tried stabbing him with her sharp spider legs but Kenji swat her away and impale her with his tail and lifted her up with Gravity Tornado, slamming her against the wall and down to the ground, continuously until he drops her. Saya grunted while trying to get up from the crater as Kenji reverted back to Monster Prince form.

"No…please…have mercy." She pleaded.

"Sorry, all out of mercy." He hissed before he rolled his eyes backward and opened his armor chest, revealing the souls of the kaiju inside him.

Saya was starting to get scared as they see her, and tried crawling away from him but Godzilla and other monsters reaches out and dragged her towards him.

"Help! Please! Mistress Oboro! Help Me!" She screamed as she was dragged inside Kenji and closed his chest.

"Hugh…" He sighed as his eyes rolls forward to see, hearing that spider demon's scream and there's a crunching sound.

He turned to see Oboro, who was injured and shocked to see Saya was dragged inside him.

"What the hell…did you do…to my beautiful creation?" She grunted before Kenji stomps on her side, making her cry in pain.

"Your pathetic creation just went bye-bye and devoured." He glared. "And you won't torment my girlfriend or Asagi…ever again!"

His back started to glow in blue as his marking on him glows and breathe Atomic Breath, killing her instantly.

"This time… stay dead." He sighed, tiredly.

Kenji went back and dispel the crystal cage to see them if they're okay. The problem is… he only see Sakura but no Asagi.

"Asagi? Asagi!" He called out to her while sniffing her scent.

Suddenly, he felt something brushed past him and knocked his mask off before looking where it comes from until something gripped his face and chest. He heard a giggle sound from behind.

"Surprise, Kenji." He recognized that voice and it belonged to Asagi but she sounded a bit more… demonic.

He cornered his eyes and recognized her face but her skin was violet, her hair was white and her eyes are almost the same as his eyes. Her uniform is much darker and armed with claws.

"Asagi?" He asked in shock.

She giggled. "No, I'm her inner demon and you and I… are gonna have some fun together."

Kenji was shocked to see that the inner demon in Asagi has taken her over and what will he do now?