"How can't you get this geso~? Its very easy geso~. If its positive on this side, its becomes negative on the other. If its multiplying, it goes dividing after it crosses to the other side the two lines. Its right there in the instructions, how can't you understand it geso~? "Ika said."I just cant! This just doesn't make sense!" shouted Eiko. "I don't get it! I don't get it at all!" She said as she took her hands to her head and screamed in frustration "Enough! Enough of this! Is useless! Everything is useless! I will never learn it!"

"Hmpf" said Ika while standing up. "If all humans are really this stupid, taking over will be easier than I though, Hu Hu." She looked down to Eiko, with her arms crossed and a smile filled with contempt.

"Who are you calling stupid you damn squid head!" Eiko shouted as she jumped to grab Ika through the neck of her shirt and lift her into the air while shaking her strenuously.
"Geso Geso!" babbled Ika, who looked as if she were going to die from the choking.

"Oh my, Oh my Eiko" said Chizuru as she entered. "I see you are having a lot of fun over here, but not everything can be play and games, you know? After all, your exam is tomorrow, isn't it little sis?" As soon as she said this, her eyes where covered by shadows and her usual smile became wider and scarier. Shaking with fear, Eiko let Ika go and placed her hands in her back, while saying: "Su-sure si-sister. We were just pla-playing, ri-right Ika? She looked towards Ika, but she had already passed out.

"Geeesooooo~" she said while it seemed her spirit was about to leave her body.

After Chizuru left, they resumed the lessons, with Ika explaining the procedure and Eiko still being incapable to understand them. It went on until Ika taught her about the basics of the inequalities and left her to perform the exercises by her own.

"So, keep doing this, until you get to something you can't solve. Try to do it at least ten minutes before asking me, and if you can't solve it by then I will tell you how to do it. I'm going to sleep there now, so wake me up when you need me geso~."

"But that's my bed!" Eiko shouted, but Ika didn't listen and lied down anyway.

"That damn squid!" Eiko mumbled, but she kept working. From time to time however, she could hear Ika talking in her sleep:

"I can't eat anymore geso~"

Then, after the eighth time Ika babbled in her dreams out loud, a mischievous idea came to her mind. She will make her pay for mocking her. She will make Ika feel as stupid as she
felt solving those dammed problems. So, she turned on her computer and browsed a few web pages for some minutes and, while checking that Ika was still sleeping, she wrote down a few words on a piece of paper. The she turned it off, and silently walked to her sitting spot, and lied there for a minute or two. Then she shouted at the top of her lounges "God, I cant do this!" which in turn, waked Ika up, just as she planned. While rubbing her hands to her eyes, the squid girl said while yawning :

"Whats the matter geeesooo~."

"This problem... its impossible! answered Eiko. "Did you tried for as long as I said, geso~?" said Ika as she walked from the bed and got closer to the table. "Yes, I did!" said Eiko "I tried and I tried and... nothing!" She took her hands to her face, pretending to cry.

"Let me see it then geso~" Ika said. Eiko handed out the sheet with the problem in it. Ika read it out loud "Prove that every even integer greater than two can be expressed as the sum of two primes"

"Hmm... Hmm " she mumbled, and stood still for a while."I don't get it" she finally said.

"Ha! I knew it!" thought Eiko "Now she will finally drop the whole act".

"I don't get it" Ika repeated "whats an integer? whats a prime? whats express geso~?"

"Eh?" Eiko shouted. "Well, this problem doesn't have the definitions like the others geso~. I used to see what everything means in the part before the exercises and then follow the instructions, but this one doesn't say what these things represent, and it doesn't give any directions at all. Where did you got this, geso~?"

"Eh.. it was a homework..."Eiko said "So you know what do this things mean?" quickly answered Ika.

"Ah.. yeah, I suppose" Eiko answered.

"Teach me! "Ika shouted, her eyes sparkling.

"Hmm.. well... A integer is a number like 1, 2 or 3. Whole numbers, with out parts.. I think." Eiko mumbled. "Normal numbers then? "Ika said.
"Yeah, I suppose. An even integer is a number that can be divided by two, like 4, 8 and 16.."

"Ok then! Now, whats a prime?" Ika asked.

Well... a prime is a number that cant be divided by any number that is not itself or one with out leaving a reminder, like 7 or 11. Six , for example, isn't a prime because.. eh.. it can be divided by 2 or 3, So...

"Oh! I get it" Ika interrupted "just like 3 or 1847 or 2447 or 7177..." Ok, Ok you got it" Eiko said, terrified of how easily she could come up with them."And express just means to represent... eh... like saying they are the same thing or something so, it goes more or less like this: 4 is equal to 2+2, two primes, and 6 is 3+3, two primes again, and 12 is 5+7 and..."

"168 is 97+ 71!" Ika shouted excitedly "Yes, exactly" Eiko answered.

"So the problem just says that I have to show that every normal number that can be split in two is the sum of two numbers that cant be divided, right?" said Ika.

"Yeah, I think thats more or less what it says..." "Doesn't sound that hard!" Ika shouted. "Yes, of course, its very easy, the teacher and my friends in school said so!" Eiko lied.

"Well" Ika said. "Where are the instructions?" "Ehh... well... I think there were none." Eiko said. "The teacher said we could solve it with just that..."

"Oh well, I will just try the instructions from the other problems until I figure out which one works." Ika said.

"Hmph...Hmph..." She sat down, took some blank pages, grabbed a pencil and started writing on them at an incredible speed. Eiko stood there, in shock, as Ika dashed through the paper sheets, filling them with her weird symbols and her strange notations.

There she stood while the minutes became hours, until at some point, Ika said "This is taking to long" and she stood up and walked away. When Eiko recovered from her shock, she ran after where she had gone , only to find Ika at the beach, using everyone of the tentacles of her hair to write in the sand, so quickly she could barely see them move and, each of them moved aggressively, as if piercing the sand with a murderous fury and hate while leaving behind strange symbols and enigmatic forms imprinted after each and everyone of their moves. She stood there, writing in the sand, until the night became day and eventually the whole beach became filled by those figures.

But even then, Ika still didn't look satisfied.

When Chizuru appeared in the morning to open the store, she found Ika lying in front of her drawings, now not writing, but just contemplating them, thinking. She found Eiko too, but just standing still, looking at Ika and her mysterious work. She seemed to had been awake all night, just watching her every move as she drew those symbols in the sand, thinking that Ika might have been possessed by an angry spirit who hated the way the world looked and decide to improve it adding her own designs to it. Now that design covered the beach, and what was then a blank slate of sand lied fill of complex figures and patters, more as a piece of modern art than something made by nature or by god.

"Oh my!" Chizuru said. "What fun game have you came up with now, girls? Also Eiko, did you forgot about your test?" Eiko snapped." Oh my god! I am going to be late for school!" She dashed back to the house, but not without looking one last time to the beach, where the squid girl still stood, frozen, looking at her own creation, with the same distant look she would had if she were looking at the horizon.

"Oh well!" Chizuru thought. "So Ika, would you tell me what where you and Eiko playing around here all night?"

"Well" Ika said, with out the frighten voice that usually accompanied her while addressing Chizuru "Eiko had a math problem and I couldn't solve it geso~. I been here all night thinking about it, and I couldn't do it, at least, not yet..."

"And what would that problem be?" asked Chizuru. "Well, its just proving that every even number can be wrote as the sum of two primes" Ika said bluntly.
"Hmm... haha well, I cant solve it either" said Chizuru while laughing. Ika eyes sparkled "A problem even Chizuru cant solve!" she thought. "Now is my opportunity to finally rule above this puny humans, He He. If I solve this problem, then I would prove myself smarter than everyone in this shop, and then they will finally kneel to me and surrender! Ha Ha!" The image of humanity bending to her will keep running through her head.

But then she remembered the time where she tried to impress Goro with her math skills, and he only stepped over her equations as he ignored her, or when she tried to show them to Nagisa, and she only responded with "well, math isn't used in everyday life" and walked away.

"Maybe math isn't that important to humans" she thought.

Well, even if it wouldn't let it to conquer humanity, she would keep doing it, since she was having fun. It was as just as fun as swimming in the sea against a strong current, or
as eating more shrimps that she could handle. It was the fun of a challenge, and it was the most fun thing she had done on a while.

She walked once again to the sea, and resumed with her sketches in the sand.