"Finally. It is done."
 
Senku looked down at the green pill in the palm of his hand. After an excruciating amount of time putting his blood and sweat into it, he had finally achieved his goal: to create an antacid. Earlier the Kingdom of Science was undergoing some dire situation: nearly all its citizens bemoaned having stomach aches and indigestion. Thinking back on how the travesty occurred was pointless, and frankly, time-consuming. As always, Senku had to scour for ingredients ranging from calcium carbonate and other minerals, and as per usual, Senku was triumphant.
 
The light green-haired genius placed the pill on a table his cocky smirk on full display. "I am definitely going to make more of these babies soon, but...I want to have a test trial."
 
A yawn rolled out of Senku's lips as he stretched his arms. It was foolhardy to even entertain the notion of deliberately giving himself heartburn, but any true scientist had to see their experiment to the end. After all, working all day long for a cure did make him famished. His empty stomach growled in response. Senku chuckled for a moment and rubbed his toned belly. "I hear ya loud and clear."
 
He clasped his chin with his thumb and index finger in deep thought. Just what should he eat? It couldn't be anything to rich in fiber lest it defeated the purpose. Fruits and vegetables were out. It had to be something that was heartier and remain in his gut long enough for the antacid to be enforced. Senku snapped his fingers. Meat. Of course! Typically speaking, meat would take about two days to fully digest in large part due to the proteins and fats making it harder for the body to tear apart.
 
But what would be the perfect source of red meat? Good sources would be beef, lamb, or goat. Senku groaned: while those are valid candidates for the test, it would take too much of his precious time to set up a trap to ensnare his meal. While contemplating his navel, he saw something rustle in the bushes.
 
Squinting his eyes, he could see the top of a melon breach the surface of the bushes. The sticks and leaves gave way revealing a small girl wearing what was now clearly a hollowed-out rind. Senku smiled. Ah, yes: Suika going about her espionage antics yet again.
 
She will do.
 
Senku's stomach growled in agreement. A truly irredeemable conception of a scheme, but it was not like he had any other alternatives. And besides, he could always make up a story about Suika being kidnapped by some antagonistic group. Truly a perfectly devilish scheme for this prodigy.
 
Senku walked over to the bushes as Suika exited the bushes. She batted at the leaves sticking to her outfit when she looked up at Senku. "Oh, hey, Senku."
 
"I see you're doing your spy operation," Senku replied, "did you find anything special?"
 
Suika nodded. "No; I should probably head home now."
 
"That's too bad. I need your assistance."
 
While it was obscured, Senku knew Suika's eyes were lighting up. Certainly; little Suika was always eager to help out her mentor ever since he made those lens for her. Aye, she was the most useful to him for her stealth missions. If a guinea pig were ever more crucial for a plan, she was the candidate.
 
"What can I help you with?" she asked.
 
"Just follow me into my lab, and make sure no one sees you."
 
It did not strike the young girl one bit to how shady Senku was behaving; she instead accompanied her mentor being close to his legs like a loyal dog. Upon entering, Senku closes the shades and rubs his hands together. "Alright, let's begin."
 
Suika tilted her tiny head. "What exactly did you need me to do?"
 
"When I said you had the most important task, I do mean it," Senku responded. "In fact, did anyone tell you how...cute you are?"
 
Suika backed away. "Yes?"
 
"In fact, you look pretty tasty, if I do say so myself," Senku said. He licked his lips already salivating at the thought of young flesh sliding down his gullet.
 
"I-don't know what you are talking about," Suika answered. She backed away more feeling more alarmed.
 
Senku anticipated that she would try to escape. He grabbed her shoulders in a quick motion and held her there. His tight grip weighed down on her shoulders. His fingers glided down to her arms his appendages clamping down hard and pinching her tantalizing skin.
 
"Stop, Senku! You're hurting me!"
 
"Hush!" Senku removed his right-hand whilst subconsciously tightening his other hand to keep her from prying away. "Everyone will hear you and this experiment will be forfeit!"
 
Suika opened her mouth to cry but something pushed down on her head. The light disappeared casting her into some black void of nothingness. She was already short-sighted, but now she was completely blind. Slurping sounds echoed in the chasm and bounced off her ear drums. While her eyesight was worthless, her other senses were kicking in. Hot steam washed over her face singing her eyes.
 
Senku stood over her taking in her entire head. Because of her small frame, he popped her entire head in his wet maw like an over-sized grape. He crammed her petite shoulders into his mouth and swallowed. Senku's cheeks bulged out in misshaped spheres thanks to her helmet, but it was nothing for a man of science to fret about. He had to admit that Suika tasted pretty damn good. Her skin gave off a vanilla flair but it was nothing too intoxicatingly sweet. The melon helmet also gave great contrast. Slathering her around with his tongue, Senku noted that there was a sweet flavor to the melon as if there were still small traces of the hollow melon half.
 
With the pressure of his esophageal muscles, Suika's helmet popped off her head gliding past the boy's uvula and into his waiting stomach. Senku felt the melon helmet splash in his stomach acid bemoaning that he almost felt full. Senku's tongue slid down Suika's flat chest. She could not help that she was still a developing girl so she would have no ample build to her, but it did disappoint Senku to a degree.
 
Hot drool-soaked underneath Suika's clothes giving her odd sensations. Senku, her friend and mentor figure, was now sampling her. Teasing her with the flick of his serpentine organ. He was treating her now like a slab of succulent meat the lowest of the low.
 
"Help, someone! Kohaku! Chrome! Anyone!!"
 
Suika's screams fell on deaf ears. The opening of Senku's stomach opened before the young girl singing her nostrils with the toxic fumes. Her helmet became a vaguely circular softening mound causing the glass lens to float up on the surface of the chyme. Suika's arms became free at that moment the first thing she tries to do being to push herself back up.
 
I was right to choose you for the experiment; your struggles are amazing!
 
She tried with all her might but no cigar. Her arms became tired and dangled over the rising stomach acid. Senku was having too much fun for him to admit, but he had to hurry up on the off-chance someone walked in at the last minute. The moment someone made their entrance, they could theoretically bash him over the head ending the experiment too soon. Besides, he couldn't hope to devour them too with Suika still thrashing around. That would be worse than standing in front of a crowd in his briefs.
 
Senku took the palm of his right hand and pressed down on Suika's rear sending her deeper into his core. Her legs kicked about, so much so, her footwear fell off, but the older boy slurped them down in one go. He squinted his eyes together and swallowed sharply. Suika's small feet bulged his neck out as they slid past his chest.
 
"BUUURRRRPPP!"
 
Saliva splattered on the ground as he caressed his Suika-filled belly. "Ah, Suika, you really hit the spot!" He licked his fingers clean of any lingering tastes. "Ten billion percent!"
 
Every slight movement he made his stomach walls shift and further trap the young girl. Suika tried to move around only to realize she was in a limited space. Add onto the fact the walls were secreting juices preventing her from having any leverage. But that was the least of the young girl's problems.
 
Senku's gut shifted into high gear to digest the sweet little girl. Despite her eyesight becoming impaired, Suika's other senses were sharpened. The vicious girl-digesting substance moisturized into her tender skin burning it and disintegrating her clothes. She could smell the scent of death lingering in the air. Bile and other fluids pumped into Senku's gut adding to the digestive cocktail.
 
A meaty belch crawled from the recesses of Senku's stomach bringing with it a small fragment of Suika's helmet. It splattered to the ground in a puddle of saliva and digestive juices. Senku leaned on his table allowing the full weight of his large belly to plop between his upper thighs. "I guess they were right when they were talking about sugar and spice, eh, Suika?"
 
Before long, Suika became nothing more than an unrecognizable mass of digested food and juices waiting to be evicted to the small intestine to be further processed. Not too long after he consumed Suika, Senku developed the early signs of heartburn: a sour taste flooded his taste buds replacing the lingering sweetness Suika had. He clutched his chest feeling a burning sensation.
 
"Ah, there we go; the stomach acid is backing up in my esophagus."
 
The bout of heartburn must have been Suika's way of getting back at him as one final laugh from beyond an amusing thought, but now it was time to enforce the antacid. Taking the green pill, Senku bit down on it and chewed it into a fine paste before swallowing it. As expected, the antacid went to work neutralizing the symptoms of acid reflex.
 
"Ah, much better."
 
Senku's belly decreased to the size of a potbelly with his small movements sloshing the contents of his girly meal. He would have to work off that added weight to avoid suspicion, and he had to do some rehearsals to explain away the disappearance of the small girl, but there was nothing a man of science could not do. "Thanks for the assistance, Suika; I will never forget your sacrifice."
 
And so, Senku began to make the first steps to mass produce antacids.