[He's grateful for the tingle, somehow reassuring despite it just coming from a talking heart, but it's still not enough to quell what Keats is feeling. It almost feels like he's just finally looked down after stepping off a cliff. For so long, he could pretend he wasn't about to fall, and now...]
[He shakes his head.]
You can't tell this to anyone, please... [What's wrong with him? He feels so scared, so worried, like he's a child facing his worst nightmare.]
Mettaton...
[His tongue feels so heavy in his throat. It's so hard to say. It's so, so hard to say. He already feels tears stinging in his eyes and he raises a hand to his face to try to cover that.]
I-I'm not human.
[There it is. The final truth. The one statement that has tormented him over and over again for the last seventeen years.]
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[He shakes his head.]
You can't tell this to anyone, please... [What's wrong with him? He feels so scared, so worried, like he's a child facing his worst nightmare.]
Mettaton...
[His tongue feels so heavy in his throat. It's so hard to say. It's so, so hard to say. He already feels tears stinging in his eyes and he raises a hand to his face to try to cover that.]
I-I'm not human.
[There it is. The final truth. The one statement that has tormented him over and over again for the last seventeen years.]
I don't think I ever was.