Blake coughed, and stretched - trying to regain his composure. Dark, cramped walls surrounded him, firm and tight - and merging together such that he couldn't make out where the ceiling or floor began. The mage instantly found himself hitting organic walls, his extremities pressing into them. The globules around him receded, like organic sacs. The slow, gurgling sway of acidic sounds, with an aura of fizzling magic, blurred his senses.
Stomach noises... Right behind him. He was in a set of abdominal muscles - by the sensations around him, those of an otherworldly, magical being. They held tight around him, and muffled the boy's voice and motions.
How had he gotten here? He tried to scratch his hair, finding none upon his head. Blake tried to retrace his steps throughout the day...
That's right - he'd tried out a new spell, that morning. Tired of the slow pace of his studies, hungry to see his skills improve... for the attention of some of his peers, incidentally... Blake turned to tomes of dark summoning magic. Among the most unpredictable; but as a studious type, it was his duty to map out the unknown. Learn more from those beings more in tune with magic than humans, or even spirits...
Instantly, as he finished his summoning circle, puffs of smoke rose around him. He found himself diminishing - squirming among the chalky outline he'd traced. His first thought was if anyone he knew would discover this secret summoning area... But his priorities changed when another pair of eyes landed upon him.
In a murky silhouette, the very creature he summoned stood before him. A beautiful, curvy woman, with an exposed stomach hanging above him. Blake stood in bewilderment, opening his mouth to speak - but barely a peep came out. In response, the huge entity's mouth before him opened...
...And slurped him in.
All he could remember past that was a long, fleshy fall, before he was washed away in splashing stomach waves...
...That's right! Blake had been swallowed by the very creature he summoned - and was now magically bound to her! And the identity of this mysterious being, brought by his forbidden magic, was...