Ai was the girl that lived by puffing out her breath along the corridors where most human ceased to exist.  Her steps would echo slowly in the enclosed hallway, the rubber of her sneakers almost skinned to her heels. Everything was moving with motion, yet she still standing at the same place. 

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Sunggyu was the boy that lived by playing with perished waste and soy-sauce-dark soil full of plant skeletons and pebble bones marrow. His long fingers might be beautiful to look at but you know, they are actually full of dirt, sins, scraps from the heart he borrowed and never returned.