Tomoya decided to teach Sumi human traits and personalities in order to hide her real identity. Tomoya didn't even know why he bring and kept an Ex-machina when he hates them so much. Tomoya talks with Sumi "Listen Sumi, You can't speak like a robot nor see your Ex-machina features in your body." Sumi replies to him while clinging in her cloak "If that's what you want then, Sumi will agree." Tomoya tried to talk to Sumi with normal conversations but it seems that it's not easy.
[Tomoya]: Your dialect and word choice is already okay but...
[Sumi]: But?
[Tomoya]: You are not applying any emotions to it.
[Sumi]: What is emotion?
[Tomoya]: Huh? Errr... It is when you express your feelings? Or what your thinking? Sorry, I can't give it a concrete definition.
[Sumi]: What is feelings? Sumi can't understand anything.
[Tomoya]: Then let's go where everyone is so you can analyze it.
[Sumi]: If that's what you want.
Before they go, Tomoya grab a piece of his clothes and dress Sumi. While dressing, Tomoya remember that Sumi is a girl but denying it thinking that she is an Ex-machina. "Calm down, She is not human."
After dressing, Tomoya and Sumi went out of their room. Sumi starts looking at the people and analyzing their conversations. After some time, Sumi is starting to understand how to speak normally in certain situations. But since she is a Machina, Sumi had a hard time analyzing how is it become emotion so he asked Tomoya.
[Tomoya]: What is it?
[Sumi]: I understand how to hold conversation, but how is it become emotion?
[Tomoya]: Don't mind it. As long as you talk like a person.
[Sumi]: Sumi didn't understand.
Mavy saw Tomoya and Sumi together. He approached them when he notices that 2 long cords are attached to Sumi.
[Mavy]: Tomoya?
[Tomoya]: What is it?
[Mavy]: What is that thing underneath Sumi?
Tomoya get's freaked out.
[Tomoya]: Err... That is... Yes! Her accessories.
[Mavy]: Hmmm. Okay.
After Mavy leaves, Tomoya grabs Sumi's hand and went back to their room. After going back, Tomoya ask's Sumi.
[Tomoya]: Sumi, Can you hide your cord? Like pulling it back inside?
[Sumi]: Impossible, Sumi's specs doesn't have that.
[Tomoya]: Maybe saying that it's your accessories will be fine.
Tomoya grabs the board for checkers, a game. He asked Sumi to play as his opponent in the game. Sumi agreed. Many rounds passed, Tomoya couldn't keep up with Sumi in her strategic abilities. In a fifty rounds, He never won even once to Sumi. "I guess i can't beat someone who has superhuman abilites beyond our power." Sumi tilts her head and tell Tomoya "Sumi is an analyzing type after all. "After playing, Sumi starts asking Tomoya.
[Sumi]: Tomoya?
[Tomoya]: What is it?
[Sumi]: What is heart?
[Tomoya]: It is an organ that resides here in our chest.
[Sumi]: Sumi didn't understand. What is emotion?
[Tomoya]: I already told you, i can't give you a concrete definition of emotion.
[Sumi]: Are you human's able to survive because of that?
[Tomoya]: I don't know. We are just doing what we can to survive.
[Sumi]: Tomoya.
[Tomoya]: What?
[Sumi]: Analyzing you, I know you are angry especially when you are seeing me. Is it emotion? Is it because of emotion?
Tomoya snaps when he heard that to Sumi. He let his anger out of Sumi and pushes her to the ground with a knife on his hand. He purposely missed his knife beside Sumi's head. "How can you say that! Do you know how many died because of you!? I'll tell you what human heart is! My heart died the day i was born. Of course i'm angry! After you force me to sacrifice my comrades! After you killed and massacre my comrades! After you eradicated all of us! Dae, Touma, Style, Toru, Shino, Shion, Nozel, Yuka, Shiro, and everyone! Everyone throw their lives just for me to live!
Tomoya began to cry. Schwi gets shocked and wipe his tears off. "I must said something terrible, i made you cry. Sumi still doesn't understand what heart really is." Tomoya back's off and cover himself on his blanket. "I'm going to sleep!" Sumi had something in her chest that she doesn't understand. "Is this... A bug? I don't know."
Sumi starts to check and update herself. Checking bugs...
1%
50%
100%
"No bug or anomalities discovered"
"If this is not a bug then, Sumi will never know."
"I want to know what is human heart. I want to know Tomoya's heart."
End of Chapter 27.