Chapter 1: First Forbidden Ass Experience in the Study Room
My name is Yuma Amano, 14 years old, third-year junior high student, 158 cm tall, looking like an elementary school kid—silver-gray short hair, big eyes with a sick kind of innocence. I have an extreme ass fetish. Ever since I was little, I’ve been unable to resist women’s butts—round, firm, slightly sweaty asses. The moment I smell one, I get rock hard and lose my mind.
My private tutor is Kamiya Rika, 28 years old, 170 cm tall, F-cup breasts, but the real killer is her perfect peach-shaped ass. Thanks to years of yoga, it’s insanely firm and perky. When she wears tight pencil skirts, you can clearly see the outline of her panties.
She comes to my house every Tuesday and Thursday night to tutor me in math.
One sweltering summer evening, my parents were away on a business trip. It was just me and Rika-sensei in the study room. She was wearing a white blouse and a black tight skirt. When she bent over to write on the whiteboard, the skirt stretched so tight that her panty lines were completely visible. I stared at those two glorious cheeks and blood gushed from my nose.
“Yuma, spacing out again?”
She turned around, saw the nosebleed, and suddenly smirked. “Don’t tell me… you’re staring at Sensei’s ass?”
I tried to deny it in panic, but she lifted her skirt a little, revealing the top of her snow-white thighs. “If you wanna look, just say it. Sensei doesn’t mind.”
The next second, she backed up and sat her ass directly on my face, burying my entire head between her cheeks through her panties. Heat, sweat, and a faint feminine scent instantly melted my brain. I let out a puppy-like whimper and started licking her ass cheeks uncontrollably.
“That tickles… little pervert.”
Giggling, she pulled her panties to the side and pressed her bare asshole right onto my mouth. “Come on, clean Sensei’s asshole. This is tonight’s homework.”
I went insane licking, drilling my tongue deep into her back door. The taste was musky and intoxicating. She moaned and ground her hips on my face. A few minutes later she came hard, squirting all over my uniform.
That night, I came for the first time on Sensei’s ass. My cum ran down her crack to her hole. She scooped it up with her fingers and shoved them into my mouth: “Good boy, drink it. This is your reward.”
Chapter 2: Full-On Perverted Curriculum Upgrade
From that day on, tutoring became “Special Ass Training.”
Tuesday lessons:
She wears different types of panties (lace, thong, sporty), makes me identify them by smell. Get it right → rewarded with facesitting. Get it wrong → 30 ass-slaps to the face.
Thursday lessons:
She brings toys—butt plugs, anal beads, enema kits.
The most depraved time: she gave herself an enema first, then pressed my face against the toilet so I could watch her expel it, and ordered me to lick the rim clean.
“Yuma, Sensei’s ass is your textbook. Study hard, okay?”
The week before midterms, she gave me “special motivation.” She tied me to a chair, clamped my dick between her ass cheeks, and rocked while making me recite math formulas. I came over and over while crying and reciting trig functions. Ended up scoring 98 on the test.
Chapter 3: Descent Into the Abyss
I became unable to live without Sensei’s ass.
At school, I’d get hard looking at classmates’ butts, but felt nothing—because “they don’t smell like Sensei.”
Rika-sensei also changed.
She confessed that ever since this ass-obsessed shota tongued her asshole, no other man’s dick could satisfy her anymore.
“Only Yuma’s tongue… can reach inside Sensei’s heart.”
The most twisted moment was my 15th birthday.
She wore my mom’s apron (nothing underneath) and baked a cake in our kitchen.
When it was done, she sat her bare ass right on the cake, coating her entire crack with cream and chocolate, then ordered:
“Happy birthday. Eat your cake off Sensei’s ass.”
I licked the cake mixed with the taste of her asshole, crying, cumming, and sobbing: “Sensei… I want to be your ass slave forever…”
Chapter 4: Exposure and Crisis
Shit eventually hits the fan.
One tutoring session, my mom came home early.
She opened the door and saw my entire face buried between Rika-sensei’s cheeks, tongue swirling in her asshole.
Five seconds of dead silence.
I thought the world was ending.
Then my mom quietly closed the door and said, “Continue. I’m going to take a shower.”
Turns out my mom also had an ass fetish when she was young (it’s genetic). She and Rika-sensei had already made a deal: as long as my math grades improved, Sensei could do whatever she wanted with me.
Chapter 5: Eternal Ass Contract
On the day I graduated high school, Rika-sensei wore my favorite white thong and gave me my final lesson in the tutoring room.
“Coming-of-age gift.”
She handed me a silver butt plug engraved with “Rika’s Exclusive Ass Slave.”
“No matter which university you go to, you come back once a month, plug this into Sensei’s asshole, then use your tongue to check if it’s still tight.”
I cried as I pushed it in, licking around the metal rim of her hole.
“Sensei… I’ll be your ass slave for life…”
Chapter 6: Ass Marriage
After university, I marry Rika-sensei. At the wedding she wears a dress that leaves her entire ass exposed. I kneel on the aisle licking her asshole to complete the vows. On our Okinawa honeymoon, she facesits me on the beach until I pass out from lack of oxygen every day.
We have two daughters, and I secretly teach them: “Daddy loves Mommy’s butt the most in the whole world.”
From age 14 to 40, I have only one religion in life:
Kamiya Rika-sensei’s ass is my entire universe.
