Ji-ah's Second Treatment (Part 2)
Althea's fingers circled lazily over my breasts. They stroked slowly from top to bottom, skirting the very edge of my areola. She avoided only my nipples precisely, and the sensation of her sweeping across my entire breast set my skin ablaze. Then the tip of her finger brushed my nipple. This time, it wasn't just a fleeting touch. Tok. The pad of her index finger tapped my nipple lightly.
"Hiiik…!"
Tok. Tok. She began tapping my left nipple repeatedly with the tip of her index finger. Each time my stiff nipple bounced against her finger, waves of pleasure surged from deep inside my breast, racing down my spine.
"Euuht… Ha, nipple… Nng…"
Tok, tok, tok. A rhythm emerged. Her finger tapped the tip of my nipple at regular intervals. With every touch, my whole breast reverberated, the vibrations sinking all the way down to the magic circle on my lower abdomen, making my balls hum.
Then her fingers changed. Her thumb joined the index finger that had been tapping away. Both fingers pinched my nipple from either side.
"Euuht!?"
My nipple was caught between her thumb and index finger. Althea's fingers paused, lightly squeezing the small, firm bud. Then she began to rub it. Swoosh, swish. Her thumb and index finger rolled my nipple back and forth while gripping it. It was a soft, slow rotation, but for nipples hypersensitive ever since my male organ emerged, the pleasure was unbearable.
"Ohooot…!♡ Ha, haa… Don't rub it—!"
My body tilted backward, pressing deeply into Althea's breasts. Up front, my nipples were being teased; from behind, Althea's nipples buried into my back.
"Twirl… twirl…"
Althea whispered into my ear. She mimicked the path of her fingers rolling my nipple with that teasing onomatopoeia from her lips. The sound in my ear fused with the stimulation in my breast into a single sensation, climbing all the way to the top of my head until my brain felt like it would melt.
"Ohoooot…!♡ Euu… Haa…♡"
My cock throbbed wildly toward the wall. The magic circle on my balls blazed crimson, and Cowper's fluid gushed from the tip of my glans, streaming down to soak the wall.
Althea's fingers sped up. Her thumb and index finger rolled my nipple rapidly back and forth. Swishswishswishswish—
"Ohooot…!!♡ Ha, haaht…! Too fast, way too fa—Uhoot!♡"
My vision went white. The magic circle's color shifted endlessly, blocking off my urge to cum. Amid it all, her ear kept whispering—
"Rubrubrub squeak—, rubrubrub…♡"
Her sweet breath tickled deep inside my eardrum. The fingers rubbing fast suddenly stopped. Her thumb and index finger, still pinching my nipple, spread apart—

Tik! Her index finger flicked my nipple hard.
"Hiiiik…!!♡"
My whole body arched vulgarly. The pleasure in my spine transformed into Cowper's fluid and spurted out. My balls contracted upward only to be pressed back down by the magic circle. The building ejaculation pressure filled to the tip of my cock, slammed into the wall, and rebounded. My hips shook uncontrollably. My pelvis started moving again. My cock swayed back and forth in the air, thrusting toward the wall and pulling back. I wanted to stop. But the shock from the nipple flick made my hips jerk reflexively on their own.
Althea's hands left my nipples. In an instant, both hands dropped to grip my hips on either side. Her hands completely subdued my waist—I couldn't move.
"I said this treatment was passive treatment, remember?"
She'd just flicked my nipple and made my hips buck wildly, but now she spoke as if nothing had happened.
"Just endure a little longer. The treatment will be over soon."
Althea's right hand released my hip and rose back to my breast. Her left hand fixed my waist in place while her right hand fondled my breast. Her thumb settled on my nipple.
"Were your nipples always this sensitive?"
Althea asked curiously.
"N-No… Before this thing appeared, it wasn't that ba—Euuht…"
My nipple was slowly crushed under her thumb.
"Ohooot…♡ Ha… Before it emerged, it was just a little ticklish… Nng…"
"So sensitivity increased after emergence. You felt it even when your clothes brushed them, right?"
I'd thought the throbbing every time my nipples rubbed inside my bra for the past month was my secret.
"Mana mutation increases nipple nerve density. Once the male organ regresses, nipple sensitivity will return to normal."
As she gave her medical explanation, her thumb twirled my nipple round and round.
"Euu… Haa…♡"
The treatment continued for another twenty minutes. Althea would rub my nipples, then stop; sweep her hands over my entire breast, then return to my nipples—repeating the pattern.
"All done."
Althea's breasts lifted from my back. Trying to stand alone, my knees buckled, and I barely held on by pressing my forehead to the wall.
"Turn around."
I turned toward Althea. My legs trembled, and my cock stood erect up to my navel, leaking Cowper's fluid. Althea looked down at my lower abdomen. A transparent thread dangled from my glans tip all the way to my thigh.
Althea's hand reached for my thigh. She scooped up the Cowper's fluid on my thigh with her index and middle fingers and brought it to her mouth. The tip of her tongue flicked over her index finger. Her fingers slipped between her lips, and I could see her tongue rolling.
Althea's purple eyes narrowed. She savored the taste for a moment, then withdrew her fingers from her lips.
"The viscosity has definitely increased."
She rubbed the saliva-coated fingertip with her thumb as she spoke.
"Mana content is up too. Nipple stimulation really boosted condensation efficiency."
I leaned against the wall, panting raggedly.
"You endured well, Ji-ah. You did great today too."
Althea took tissues from the shelf and began wiping around my cock. Her gentle touch swept away the Cowper's fluid from my skin. She lightly wrapped a tissue around my cock to clean the fluid there too, and at the contact, my cock twitched once. Althea helped me into my patient uniform. As she buttoned the top from the front, my still-erect nipples rubbed against the fabric the moment it touched my breasts. She pulled up my bottoms, and I perched on the edge of the bed. Sweat dripped from my forehead down to my chin.
Althea put on her uniform and buttoned it up. Watching the woman who'd just been rubbing my breasts transform back into the prim and kind nurse stirred a twisted sense of taboo.

"Oh, right, Ji-ah."
Althea paused while straightening her cardigan sleeve and turned to me. Her purple eyes beneath her droopy eyelids blinked, as if remembering something.
"How do you usually masturbate?"
What?
"M-Masturbate?"
My voice cracked, and my face burned to the tips of my ears. I'd written it on the questionnaire, but saying it out loud was mortifying.
"You wrote on the questionnaire that you had masturbation experience using your male organ."
Althea pulled a chair beside the bed and sat, knees together. Her thighs spread wide over her thigh-highs, drawing my eyes.
"To plan treatment, I need to know what kind of stimulation you're used to. Did you use your hand? Any tools?"
It was a professional asking about a patient's history.
"J-Just… with my hand…"
"Gripping your cock and stroking up and down?"
Cock. That crude word in Althea's gentle voice.
"…Yes."
"Did you retract the foreskin? Or not?"
My face felt like it would explode.
"R-Rectracted…"
"Speed? Slow? Fast?"
"S-Slow at first… then faster later…"
Althea pulled out a silver clipboard and started writing something. The pen sound echoed in the quiet room. I clutched the bedsheet, confessing my masturbation habits to a succubus nurse.
"How long to ejaculation? Five minutes? Ten?"
"About fifteen…"
"Did you touch your balls or anus?"
"N-No! Not there…"
"Nipples?"
"…A little."
Althea's pen paused, and she looked up at me.
"From your reaction earlier, you seemed used to nipple stimulation."
Meaning she'd been observing while rubbing them just now.
"Did you touch your nipples while stroking your cock too?"
"…Yes."
The pen scratched again. "What about using your female organ?"
"T-That…"
"It's info needed for treatment planning."
Althea said softly. Her purple eyes gazed steadily at me.
"One of your dual prostates is at the G-spot inside your vagina. We're checking because prostate stimulation treatment might be needed."
Treatment inside my pussy too, not just my cock. My mouth went dry.
"…With the showerhead…"
"Showerhead?"
"The water jet… against it…"
On my clit. I couldn't say it aloud, but Althea seemed to understand and wrote something on her silver clipboard.
"Insertion?"
"N-No, never."
"Fingers too?"
"…Tried once, but got scared and pulled it out right away."
The pen clicked, adding a line to my masturbation history.
"Thank you, Ji-ah. For being honest."
Althea set the clipboard on her knee and smiled. Honest—she'd know if I lied anyway.
"This lets us adjust future stimulation treatments. Knowing your nipples are a weak point is good info."
It sounded like she'd exploit my weakness for more effective stimulation. Althea stood and brushed my hair back. Her warm hand passing over my forehead made my eyes flutter shut.
"Have lunch, then we'll start afternoon treatment. Rest until then."
Her cardigan hem swayed as she walked to the door. Althea turned at the threshold.
"Oh, I'll change the sheets during lunch break."
The door closed. I'd told Althea everything about how I masturbate. Stroking with foreskin retracted by hand, nipples too, cumming in fifteen minutes. I wanted to pull the blanket over my head, but the blanket was on the floor.