Festering Desire

Almost two weeks had passed since the incident at the hospital. During this period, Yuri visited Leo a couple times at his apartment to express her gratitude with food. Despite being conscious of the immorality, the young teacher understood that she had developed a tabooed feeling towards her student. As a maiden who never dated a single man her entire life, there was a strange force at work that gravitated her body towards him.

On a certain day, she brought her best friend Karen, who finally recovered from the hospital, to visit the boy. When they arrived, the two women found the door was unlocked and odd noises were coming out of the room. They peeked inside the apartment and bore witness to the stud ramming Lilith with his monstrous rod on top of a pool of thick cum in the living room. The couple inside was too busy to notice the presence of their visitors.

Fortunately, they were too engrossed with the visual shock of Leo's inhuman size and capacity to notice Lilith in her succubus form. The two women left the food behind and quickly fled the scene with throbbing hearts. A simple whiff of the boy's emanating pheromone was enough to get their crotch tingling. From that day onwards, Yuri-sensei would blush whenever her eyes met with Leo's during school.

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Lilith, on the other hand, was living her succubus life to the fullest. She had been treading on a fine line between being turned into Leo's personal cock sleeve or becoming a mindless sow for Leo to breed anytime. Oh wait, the two might mean the same thing. Anyway, the girl had been taking every opportunity she had to join her body with the impregnating rod.

For instance, right at this moment, the couple was hiding in the girl's restroom. Lilith was kneeling on the ground with her head facing up. Her mouth was stretched wide open with viscid white seeds viscously overflowing, accumulating a pond on top of her chest. The menacing leviathan that recently visited her throat casted a long shadow right above her face; it was still dripping down slimy residuals out of the orifice.

Swallowing down the servings left in her throat, Lilith let the heavy pole rest on top of her head as she cleaned the base of Leo's oversized twin vessels with adorable ticks of tongue. Eventually, working her way to the tip, the two plump glossy lips sucked out the remaining seeds stuck within the gland. Then while savoring the pristine essence, hints of clarity and rationality diminished from her pupil as she stared perpetually at the dominating aura emitted from the thick rod.

On the floor besides her meaty thighs were numerous large bubbles of rubber. These were the super-sized condoms that Lilith managed to procure through custom orders. They were all filled to the brim by Leo's voluminous essence, still radiating in heat with immense energies. Lilith ran out of condoms in the middle of her milking session and took in the last few loads herself.

However, Leo wasn't quite satisfied with the amount of discharge as his diet had increased recently. He picked up the kneeling girl and sat down on the toilet seat, then ruthlessly pushed her body down to his towering rod. This time, with her thighs and plump buttock sitting on the boy's lap, the monstrous manhood reached the very depth of Lilith in one setting.

Her mouth could not close and her long tender tongue was left sticking out. Her eyes were rolled back in white while tears were forming at the corner of her eyelid. Lastly, her feet and legs tensed up and their muscles tightened, but then they quickly lost strength and hung loosely in the air.

The appearance of the obscene bulge outlining the shape of his monstrosity was cleanly defined on her soft belly. The bulging mushroom cap was occupying the tiny space within her womb. The walls of her interior were painfully stretched out, yet, all Lilith could feel was ecstatic pleasure as she spasmed out with constant squirts.

While making shattered moans from the upheaval, the girl could not utter a single word with her brain frozen in stasis. Lilith was still in her human form, and Leo seemed to have forgotten about the fact he never handled her so roughly in her human form. It was fortunate that Lilith had enhanced physical constitution regardless, as things might not end well for a regular female.

"Whoa! Lilith I am sorry! Are you ok?" The boy slightly panicked, which caused his towering rod to stir inside her tunnel. One could see the twitching of the behemoth behind the skin of her belly.

It also seemed like Leo was oblivious to his recent growth sprout from all the nutrition he had been getting. But Lilith, on the other hand, could feel every inch of his imposing mass stretching ever so deep and wide within the tight interior.

"To..too....big..." The succubus finally transformed and managed to reclaim some of her fading consciousness.

"My bad, I was too hasty. Can I move now?" Even sitting still, the towering rod pulsated with incredible power that vibrated throughout the girl's entire body.

"If...you want to completely break me, yeah...go ahead." Lilith had no self-confidence as a succubus.

After several minutes, wet and slurpy gurgling sounds were heard after every clash and reverberated through the restroom with conspicuous volume. Attracted by the thunderous drumming of the intense battle, a few girls walked inside and saw a small puddle of white cheese flowing out of the toilet cubicle. They thought there must be a broken hose leaking out strange liquid and were wise to hold their breath from the intoxicating pheromone that saturated the air.

By the end of the deed, Lilith sat lifelessly with a bloated stomach on top of the boy. The excess that leaked out from her crotch already dyed the veiny manhood in white while filling the toilet down below in layers of thick cake. At last, the culprit was found. The plumber would be furious to know that it was Leo who clogged the toilets during these past few weeks.

Lilith was able to recover before the end of school. In anticipation of being made into a mess, she learned to always prepare a spare set of clothing whenever she was with Leo. After wiping off the stains and changing into fresh clothes, the succubus attentively stored loaded condoms into her bag.

"Lilith, why are you keeping them?" Leo's monster throbbed again at the sight of Lilith hoarding his seeds.

The weighty contents within the rubbers were the fruit of her hard labor during the past hour. Milking the stud with her soft hands and bountiful breasts were very effective. Quite often, Lilith noticed the boy had been staring at the black stocking over her thick thighs and slender legs, maybe she can add another play into her book in the near future.

"So... You are leaving to visit your home when summer starts right?" The succubus reluctantly asked.

"Yes, it should be within this month, or maybe earlier." Leo pondered while he spoke.

"Well...I need to stock up on provisions for the time when you are gone. I got a family to feed after all." There was absolutely nothing wrong with what Lilith just said.

"Say what?"

"What?"

The two stared at each other in the eyes and remained in silence. Before long, Leo was the first to concede before Lilith's innocent gaze. The boy pretended to not hear or comprehend what was said while Lilith pretended that she never said anything.

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Fast forward to after school, the boy met up with the female agent as his new daily routine.

Ever since Leo agreed to join her on various spirits hunting missions, Jean finally got to witness how a glutton mercilessly devoured his food. In one way or another, the supernatural entities she was tasked to eradicate always ended up in the boy's stomach. The female agent had also gotten used to the eye-catching bulge in his pants whenever he had a big meal.

However, Jean didn't manage to get Leo to officially join her team, but she was happy to keep the status quo. Speaking of which, the boy never met any of Jean's team members... other than herself.

And tonight, there was another mission at the hospital. It was a similar evil spirit that was born out of the grudge of a victim that died at this place. Of course, that spirit didn't escape the fate of being devoured by the boy either. But this time around, Leo found a strange nucleus within the spirit.

The crystal core contained the compacted essence of the spirit's Anima. They were generally pure white or transparent. Yet, the one in his hand had a visible shade of dark inside. A realization came to his mind. He pulled out the crystal of the infant spirit that haunted Jean and also saw a tiny speck of dark shade.

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Later that night, the diligent boy was back on the desk studying the runes of the black grimoire to decipher the mysterious dark shades within the crystals. Coincidentally, there he found more empty chapters within the pages.

Leo had a feeling that the missing information could be important. The days of summer vacation were approaching and it was almost time for him to return home. Perhaps he could ask Grandmother about the details; she was the previous owner of the grimoire before his mother after all.

With the crystal shards left inside the hidden drawer along with the grimoire, the boy soon fell asleep in his bed, unsuspecting of the malevolent spells hidden within them. During his slumber, black smoke steadily flowed out of the drawer and engulfed the boy.