Breath
He lay listlessly on the cot, the sun's morning rays shining in on his nude body. As he stared up at the ceiling one hand drifted downward, taking his length in a loose grip and moving his fingertips across it until it grew firm in his grasp, not really motivated to go beyond that. Slowly blinking, he took a long breath.
"Haah..."
His chest and abdomen rose but barely fell, three new mounds which half-obscured his manhood.
"Haah..."
He grew higher, the mounds inching upward as his hips were lifted up, ever so slightly, by an expanding backside.
"Haah..."
The expansion spread to his limbs, shoulders and thighs widening as he lay even once more. Even, but by no means flat.
With each casual, drawn-out breath, more curves formed across his once-lithe figure. Musculature disappeared into smoothness, boniness into airy bulk. His body was lifted up as his back grew into a smooth arc between shoulders and butt, and his arm moved more slowly as his limbs grew thicker. Eventually the curve between his neck and groin had grown so high and wide that his hand could not reach, and he simply rested it atop himself.
"Haah... haah..."
His legs hung half-bent before they widened and stiffened, heels lifting off the floor. Both arms hung outward by his sides, fingers gently moving. Bit by bit they turned wider and flatter, disappearing into his contoured, growing torso. By the time his navel touched the ceiling his hands and feet were half-covered by divots in his sides, with his head sunken in and supported by the swollen ring around his neck.
"Haah..."
His top and bottom spanned the height of the room, but there was still space to grow as his head, sides, and manhood continued towards the walls. First his shoulders touched one wall, then his balls pressed painlessly into his closet door, then his sides filled the last of the space. He was aware of the resistance the walls gave, and the rising pressure, but he kept breathing in and never exhaling.
"Haah..."
Even when the closet door buckled and broke off its tracks.
"Haah..."
Even when cracks formed along the walls.
"Haah..."
Even when the roof started to lift up.
"Haah... haah..."
Then finally, even when the part of the building he was in gave way, timber and tiling being catapulted away by the expanding young man inside. He continued to grow with each breath, casual in effort but massive in scope, his body bulging around the remaining bits of wall until they were either broken, shoved aside, or grown over. The morning had a chill to it, counteracted by the warmth of the air inside of him.
Neighbors were the first to see him, at first mistaking him for a blimp. But no blimp grew in such steady pulses, nor were they so oddly-shaped, rounded in parts and with deep dimples in others that suggested a distorted human form. Nor had any they had seen before borne a massive phallic protrusion that bobbed weightlessly as it filled from a source unknown. As he grew from a scale visible by neighbors to the neighborhood, they could gradually hear a sound like slow, steady breathing.
"Haah..."
He grew several stories higher once more, parting the clouds - at first with his belly, then with the tip of a skyscraper-sized length. They flowed around him as he pushed upward ever further, ringing his his body before eventually disappearing, partially inhaled, partially dissipated by the heat of his body. He was mountainous, then minutes later, beyond any mountain in scale.
Beyond all reason the young man swelled, stretching further and growing in larger fits. Stories had become entire buildings, then miles. After a while the nation was in his shade; mere minutes later the hemisphere. Several more, and all that could be seen in the sky was the curve of his back through the haze of the atmosphere. That he would soon be the largest object in the solar system was not on his mind, nor was the moon, as his titanic length batted it out of its orbit. Little was, as he laid listlessly on a cot that scarcely even registered against his body, taking in long breaths.
"Haah..."