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.

Kenji even interrogates Black Orc Tribe, demanding them the whereabout of Edwin Black. Dogle said he doesn't know where he is so Kenji kills him by gutting Dogle like a fish as his Terror-Beast kills the rest of the orcs before leaving.

Kenji flies in his Titan Crawler form, which he was able to control its form, caught the whiff of Incubus scent coming from the Kanto region. He flew down and went into camouflage sniffed a scent, coming from the park. Kenji saw two young boys and the woman, who smelled half-demon until they're confronted by a demon with white hair. Kenji changed his form into a green scale elephant-like monster with horn on top of his head and a long whip-like tail. He revealed himself, roaring at them and charged at the demon, who wasn't expected to see a creature here before grabbed by his nose trunk. The demon was shuddered by its creature glare as he looked at his angry amber eyes while Kenji was about to read his thoughts, to look for Edwin Black's whereabout. While he was looking for Edwin, he also see three gagged woman and they were a retired Taimanins. Since he knows where are they held captive, he conjures Gorosaurus and fed him to it. As he renounce the theropod kaiju, another Taimanin showed up in the scene with group and saw the monster before it changed form into a dark grey creature that looked like a leopard/seal with webbed hands and long fangs and tracking down the missing Taimanins.

When the scents is getting stronger, He shift back to the Titan Crawler and breaks in the warehouse and found the three retired Taimanins, who were held captive by a demon. Kenji hears his thoughts as his plan was to used them to breed a newborn demon army and roars at the demon. He frees and breaks the seals on the captured Taimanins and Kenji used his prehensible tongue at the demon and swallow him whole. He motioned that to get moving and return to their normal life that that once stolen from them before flying back to Tokyo.

As the summer hits this season, Kenji was training with Tatsurou since he 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 relived 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 monster, 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 paint of it, he heard his phone rang. He puts the painting 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 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 Iwaga sisters used parasail to land while Kenji dives down and glide his insect 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 it." 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 to 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, 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 .

"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 now 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, promised to Kyousuke that he will watches 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 turned into demon form. 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 a power outage.

'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 as 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 found him, destroying all the lab.

"What the hell is that?!"

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

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

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

"Destroys this hideout." He ordered it.

"HHHIIIISSSS!" It hissed before 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!" He said while running and arming his halberd, Warhammer, stone sword, Gigan's scythe blade, and lava sword.

He also conjured a Giant Octopus, ordering it to destroy the Tokyo Kingdom Bridge, making sure no one leaves this island. He plans to kill them all, be it demons or humans because everyone in 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 Iwaga and Sakura Iwaga." 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 demon from behind without Oboro or anyone noticed and stabbed in the chest while muffled for 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 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 was angry and shocked 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 Iwaga 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 Toyko Kingdom as official hariots!"

Everyone cheered while Kenji remained silence.

"Big sis…" Sakura concerned.

"I'm sure Kenji will come soon." Asagi assured her. "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." Oboro smirked.

"Kenji will kill you again and your demonic actions!" Asagi cursed her.

"Oh, who is this Kenji person you said?" She asked. "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. The Monster Prince had enough and dropped his disguise before teleported behind Oboro, surprising Saya and everyone.

"You-" She was stabbed by his halberd as Kenji glared at her with glowing predator amber eyes.

"I thought I killed you in that bloody arena!" He snapped before throwing her at the wall.

"Mistress Oboro!" Saya cried.

"And you!" Kenji clamped her neck by 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, surprising 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 stand in front of Asagi and Sakura.

"Those eyes? 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, armed all his weapons and raised the crystals walls, preventing them from leaving. "It will be your last thing you've ever see."

The Monster Prince as his marking is flaring up while his hair is spiking before jumps up and dives down to begins his slaughters on all the demons by slicing them from limb to limb and cutting off their heads.

Once he's done killing all of them, he was covered in blood before de-morphed to his human form and went to the Iwaga 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 into his lips, shocking Kenji while roaming her tongue in his mouth.

'Forgive me, Kenji... but I needed you to have sex with you 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 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!"

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

"Oh yeah, and what are you gonna do about it, little brat?!" He dared before sniffing the scent form 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 Taimanins." She sneered. "And you'll pay for this."

"So this is your demon form, huh?" He said, putting them in the crystal cage. "Not impressive. Let me show you what this power is."

Kenji turned 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 punches her and lifted her up with Gravity Tornado, slamming her against the wall and down to the ground. 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.

Saya was starting to get scared 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 back to see before turning to see Oboro, who was injured and shocked to see Saya was dragged inside him.

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

"I feed on her soul… to the kaiju." He replied. "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 she is until something wrapped around his face and his 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 fun together."

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