Zerah doesn't really do much when he's left to his own devices. He doesn't have many memories to think back on, he doesn't remember how to do things like read to past the time. He isn't skilled at anything in particular and hasn't found any hobbies that interest him. He can't even make himself sleep. All he can really do is sit and wait.
But it's okay, he's good at waiting.
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Archidaequiem
AW Zerah. It's okay. Eseo will come back soon and you'll have something to do with yourself again.
I really love the mood you got out in this one. It really describes how he feels about being left to his own devices. He doesn't have anything to think about so he thinks about Eseo instead... It's sad but adorable at the same time. I love the touch of him drawing a little Eseo on the window.