Tomoya saw Sumi holding a board game, Checkers after he woke up. Tomoya gets close to her and apologize to her.
[Tomoya]: Sumi, ummm.
[Sumi]: Sumi understand the situation.
[Tomoya]: Huh? How do you know?
[Sumi]: Sumi also don't understand. But Sumi kind of fault here.
[Tomoya]: Anyway, I'm sorry for snapping yesterday.
[Sumi]: Hmmm, Got it.
Sumi then challenge Tomoya to a game, Checkers which Tomoya agrees. While playing, Sumi saw Tomoya smiling and having fun while they are playing. It was like his seriousness or cold eyes are completely gone.
After playing, Tomoya then tells Sumi that they she will accompany him in his mission. "What kind of mission is it? Tomoya." Tomoya replied, "We'll just be observing them. Can you analyze them well?." Sumi agrees and gets a smile on Tomoya and pat her in her head. "Thank you, Sumi." Sumi then propose something that she will create an anti detection.
[Sumi]: Sumi then will create an anti detection.
[Tomoya]: Why? And what is it?
[Sumi]: So they will not detect us. It is just signal jamming.
[Tomoya]: Hmmm, We can search for the parts while observing. I think.
While on their way, Tomoya wondered what Sumi's goal really is. He is looking at her the whole time they travel. As the time goes by, Sumi detect something. "Stop, Tomoya. I'm detecting a signal." Tomoya grabs Sumi's hands and hide on the nearest building. He looks around and saw some Ex-machina doing something in the neighbor building. "What are they doing here?" Sumi analyze them. "Tomoya, Sumi warns you. They are combat and analysis type of Machina." Tomoya then waits for them to leave.
After the Ex-Machina leaves, Tomoya rushes to go there, Only to see some weird gadget on the table. Tomoya opens it. "011010110111101." Sumi got shocked on what she read. Tomoya asked her "What is this Sumi?" Sumi replied "Ah, Nothing. Just scrambled numbers." Sumi saw a phone, battery and antenna and she get it. While Sumi is busy getting the parts, Tomoya observes Ex-machina's behavior to Sumi and he compares it. "Ex-machina seems moving according to system orders while Sumi has her own free will. Or Sumi is abiding her order? No, no impossible, I've never seen an Ex-Machina having a feelings." Sumi calls him over and over again but Tomoya is too absorbed on his thoughts that he doesn't notice Sumi. Sumi looked at him and pat his head. "Ah Sumi? What are you doing?"
The building suddenly collapse. Debris are falling to them so Sumi tried to fly grabbed Tomoya. The windows got blocked so Sumi rushes to go to the lowest floor and exit to the main door. But, the ceiling collapse before the door. Sumi throws Tomoya outside and Sumi got caught in the falling ceiling.
Tomoya loses his consciousness for a few seconds. When he regains consciousness, he got trembled. "Sumi? SUMIIIIIII!!!." Tomoya then rushes to moved the debris and search for Sumi. "Sumi, where are you?" "Sumi, Sumi, Sumi, Sumi" Tomoya moved the debris and saw Sumi. Tomoya hurriedly carry her. "Sumi? Are you okay!?" Sumi then suddenly gain consciousness and stand, blurting something.
"Restarting the program"
"Analyzing damage to the unit: scratches from the skin."
"Condition: Excellent"
[Tomoya]: Sumi?
[Sumi]: Huh? Tomoya?
[Tomoya]: I'm relieved. Nothing serious happened to you.
Tomoya carry Sumi and starts to leave the city. "Tomoya, Sumi is fine." Tomoya replied "No, just rest and i will carry you to the hideout." Sumi just smiles and lean Tomoya's chest. While on the way, Sumi is analyzing her chest. "What is this? Sumi doesn't understand this phenomenon inside my chest."
End of Chapter 28.