An hour after Yonah's discovery, they return to the castle and she seemed to know Devola and Popola who asked to take care of her. Zero and the group accepted and Isurugi and 9S are now in his studio studying the books found at the time of Yonah's awakening.

"It's amazing!" Said 9S flipping through one of the books. "There are many interesting things in his books. There are even plans on the system rider and various weapons for the project that have failed for technical difficulty." He said, drawing Isurugi's attention.

"Wait, what?" He said, releasing his attention from his book to watch what 9S reads with excitement.

"Real kids in a toy store." A2 says as she and 2B watch them from the entrance to the room.

"In view of what their study of books can bring us as an advantage in this war." Said 2B before leaving in the corridors.

"Where are you going?" A2 asked.

" I have something to do." Replied 2B.

"I'm not going to ask you what it is, but I hope you will not have a problem." Says A2.

"Yes mom." Says 2B with a smile that A2 does not see.

"Don't call me that. I am not your mother." Says A2.

"But YoHRa was inspired by you to create my type of unit." Said 2B before continuing his route leaving A2 with a half-smile understanding that 2B that made fun of her.

At the same time at Athnan Castle, Two and Ryu are in their shared room after he reports the mission to the amusement park.

"If we can't get the Bottles and the Pandora Box, we can never find a way to stop this unnecessary war." Said Ryu frustrated that his plan is not working.

"If this continues we will have no choice and we will have to appeal to the law of the covenant." Said Two, lowering his head.

"What is this law?" Ryu asked.

"A law that I, my sisters and my mother put in place a long time ago for extreme cases during the construction of our plots." Replied Two wanting to keep this secret law.

" I see. If you don't want to tell me more, it's your choice. But you know why I'm fighting for that. I want to have a chance to live freely. Not as a leader and her lover and guardian of his plot. And if we succeed..." Ryu said before Two interrupted him.

"We still need to know how to do it. The Pandora Box is unpredictable if you can not control it. And Stalk knows every weak point of the System Rider which gives One a benefit and we know what she will do with it if she manages to use it." Said Two defeatist.

"Not if we hide it. If we win, we just have to leave. Just you and me with Bottles, Pannels and Pandora Box. So in the worst case we can save time. And be released from the plot and its obligations." Ryu said.

"It's true, but it will be a cowardly conduct. And my father would not have accepted it." Two said, refusing the idea.

"Okay. I'll let you decide." Ryu said.

"Thank you..." Two asked.

Later in a desert at a certain distance from the castle, 2B arrives at a camp where there is an android with black hair and gray eyes wearing a military outfit with hooded rag to protect from the sun.

"2B. What is the pleasure of your visit?" The android asked.

"I need your help Jackass." Says 2B giving the name of the android.

"Really? Why exactly?" Asked Jackass with interest.

"Your drug that me and 9S had helped you develop, it was good to recreate the feeling that humans have when mating for androids is not it?" Asked 2B.

"Not really. It's like the chemical agent that the brain of an android created during a fight that floods our circuits of happiness. You and 9S allowed me to have enough to give to isolate the substance for the drug. Why?" Jackass asked after summarizing the substance spoken of in 2B.

"Could you give me a dose, please?" Asked 2B.

"What did you do with the samples I gave you?" Asked Jackass.

"They were destroyed during the fight against Eve." Replied 2B.

"I see and why do you want it?" Jackass asked, wanting to satisfy his curiosity.

"Some humans are still alive in different places safe from the war against machines and where machines and androids flee the war. Now that these places are at war with each other. Me, 9S and A2 help one of these places to fight against those who attack it. And a short time ago a human took me in his arms. I can not recognize the feeling I felt at that moment. So I would like to be sure and see if it's the same feeling that your drug is reproducing." Explained 2B.

"Okay, I'll give you a new sample, but on one condition." Said Jackass.

"Which?" Asked 2B.

"I want you to take me to the place you are defending. All his research possibilities that I could do with humans would be great." Said Jackass excitedly.

"... Okay..." said 2B with a hint of hesitation in his voice.

"So let's not waste time. I take my things and we leave. I will give you the sample once arrived. I promise." Said Jackass, before taking out a bag in which she put several objects including a tablet and some chemistry instruments.

Once that's done 2B leads Jackass to Zero Castle, she was immediately taken away by 2B to see the leader lying in a room with a reflective desk while looking at a cube trapped in a glass box.

"Excuse me, Zero..." says 2B catching his attention.

"Oh, 2B. what can I do for you?" Zero asked before seeing Jackass. "Who is she?" She asked.

"Here's Jackass. She is a scientist who worked with the resistance and YoHRa. I thought that with the arrival of Yonah, we would need someone able to create drugs in case she gets sick." Says 2B lying to allow Jackass to have access to a lab.

"I see. Very good initiative." Zero said before approaching Jackass and handing him a hand to Jackass. "Welcome. I am the leader of this plot. My name is Zero." She introduces herself.

"Nice to meet you. My name is Jackass." Said Jackass introducing himself.

"2B, can you drive her into the lab so she can get that familiar with the material?" Zero asked.

2B nods and leads Jackass to the laboratory located near the Isurugi workshop. And after receiving her sample of drugs promised by Jackass she went into the shop to find only 9S reading the books.

"Oh, 2B what is it?" Asked 9S.

"Where is Isurugi?" Asked 2B.

"After Seeres passed by to see the weapons he made, he went with Yonah to the city streets to help him become familiar with the machines. Why?" Asked 9S.

"I just wanted to know where he was." Simply answered 2B.

For its part, Isurugi made Yonah visit the city.

"Isurugi, are there still people like us?" Yonah asked.

"Do you mean humans?" Isurugi asked, nodding to Yonah. "Apart from Zero, you, me other leaders and their warriors there are more." Isurugi replied before seeing Yonah bowing his head.

"Then I will not see my brother again..." Yonah said sadly.

"I'm so sorry Yonah." Isurugi said sadly.

"You don't have to apologize. He told me what I was risking when he put me in the capsule where you found me." Yonah said trying to smile anyway.

Suddenly, they hear noises and insults. Isurugi followed by Yonah went to the source of the noises to find an android maltreating a machine that begs him to stop while he ignores his supplications.

Isurugi stepped in and pushed the android away from the machine, helping him up.

"What do you want?!" The Android said angrily.

"This place is a place of peace. What's more at war between androids and machines is over. So you have no reason to destroy machines anymore." Isurugi said.

"So what?! My teammate was killed because of her salofes! And you want me to skip that, just because I'm in a place where there's peace between android and machine?!" The Android said angrily.

"Yeah, because otherwise, it's me, you settle your account." Isurugi said, taking out his Build Driver.

"Is it you Build?" Said the android surprised.

"Yeah, and if you challenge me again, I will not hesitate to kill you." Isurugi said as the android recedes.

"Very good way of persuasion." Someone said catching Isurugi's attention as he turns to see Blood Stalk.

"Stalk! What do you want?" Isurugi asked, putting himself in a fighting position.

"Just face you. I want to test your skills." Said Blood Stalk.

"Yonah, get yourself safe." Isurugi ordered those to whom the little girl obeyed.

Isurugi put his Build Driver at his waist and took the Bottles Taka and Gatling, not wanting to waste time with RabbitTank and inserted the two Bottles in his Driver.

Taka! Gatling! Best Match!

While the early Jingle Isurugi cranks the Build Driver while half of orange and gray armor appeared before he stopped the tour.

Are you ready?

"Henshin..." he says as the two halves of armor get closer forming the armor of the Best Match.

Tenkuu no Abarenbou! HawkGatling! Yeah!

Then placing his hand in front of his Build Driver and the Hawk Gatlinger appeared in his hand.

Hawk Gatlinger!

He then flew off with the orange wings provided by the Taka Bottles and started attacking Blood Stalk with the Hawk Gatlinger but it did not seem to hurt him. Blood Stalk pulled out his Transteamgun to shoot Build's wings as it dropped to the ground as he pulled out the Bottle representing a hedgehog and a fire truck and used it to replace the Taka and Gatling bottles.

Harinezumi! Syoubousya! Best Match!

The Jingle start again and Build cranks while half of white and red armor appeared before he stopped the tour.

Are you ready?

"Build up..." he says as the two halves of armor get closer forming the armor of the Best Match.

Rescue Kenzan! FireHedgehog! Yeah!

Once in this form the fight resumed and this time Build had the advantage for the rest of the fight until Blood Stalk finally stopped him by shooting him in the head.

"You are so stubborn in protecting the people of this plot that you do not even know that the guardian of an enemy plot lives right under your nose." Blood Stalk said to run away thanks to the smoke produced by his Transteam Gun.

"What did he mean?" Yonah asked out of his hiding place as Build removed the Bottle from the Build Driver again becoming Isurugi.

"I do not know..." Isurugi said anxiously.

Later, once back at the castle, Isurugi finds himself in his workshop while 9S had just come out to rest after studying all day, leaving Isurugi alone with his thoughts while Yonah eat with Seere watched by Devola and Popola.

"What did Stalk mean? A guard from one of the other countries would be under my nose. Like some sort of double agent..." He thought before he heard the door open, doing it back to see 2B without his bandage moving uncertainly, as if she could lose her balance at all times approaching him.

"Are you okay 2B?" Isurugi asked before 2B turned the chair on which he sat and climbed on it with his knees resting next to Isurugi's legs.

"Do not worry, Isurugi. Everything will be alright." Said 2B taking Isurugi's hand to rest on one of her breasts making him blush profusely.

"W-Why are you doing this?" He asked before 2B gave him a deep kiss which made him blush even more before she broke it.

"I want to be closer to you, Isurugi. Like in the park after your fight. I want to find that feeling I felt when you hugged me." She said before tucking her face into the hollow of Isurugi's neck that hangs for a moment felt a sensation at that level.

He did not know how to react and froze for several minutes before feeling 2B snore indicating that during his action she fell asleep. And gently, without waking her, he puts her on her own bed and lets her sleep before leaving the room to find Jackass he had crossed earlier on his return to the castle.

"I thought that she had taken a few more doses than I gave her." Jackass said.

"What did she take?" Isurugi asked.

"A drug designed to reproduce the feeling of pleasure that androids experience in combat, which is similar to the one humans experience when mating." Jackass explained again blushing Isurugi while the one he had because of 2B had calmed down.

"Oh… Could you make sure she can not get any more, please?" Isurugi asked not wanting her friend to take drugs.

After this conversation Isurugi went to Zero's office wondering why a new person arrives in the castle and 2B acts like that after Stalk is told that a parcel keeper lives under here. He put his suspicions aside and entered the office to surprise Zero in full video communication with a person he did not know.

"What do you want Two?" Zero asked, telling Isurugi that she was one of Zero's leaders and girls she was talking to.

"I ask to apply the law of the pact." Said Two with determination surprising Zero.

"Do you know what happens if you lose?" Zero asked, wanting to be sure of what his daughter had just said.

"Yes, and I'm ready to take the risk of defeat. So mom, do you accept?" Asked Two.

Zero hesitated to give her an answer, but in the face of what she would have to gain, she made her decision.

"Okay, two. In a week in the Coliseum of the city overwhelm." Zero said with a look as determined as his daughter's.

"So be it. See you in a week." Two said before cutting off the transmission.

"What is the law of the pact?" Isurugi asked, noting his presence at Zero.

"It is a law made for the plot war stipulating that a leader asked for a confrontation between her guardian and that of the parcel challenged. The land, the guardian will win the Bottles and panel loser and if it has it, the Pandora Box." Zero explained.

"So, in a week, I'm going to fight Cross-Z. For his Bottles and his Panel." Isurugi summed up.

"Yes..." answered Zero.

"I hope we win. Maybe so you and one of your daughters can be close again." Isurugi said before leaving the office wanting Zero to be ready to make a decision when he tells him what Stalk said.

"Should I have told him that he has a hickey on his neck?" Zero wondered with a light one wanting to think about seeing another of her daughters who for the moment is her enemy.