Track Team Tomboy Is Secretly a Total Slut • Extreme Contrast Training

Chapter 1: The Tomboy Everyone Knows

Takahashi Aoi, the ace sprinter of the track and field club.

170 cm tall, broad shoulders, long powerful legs, faint abs visible. She always tied her hair up in a rough high ponytail, wore oversized athletic jackets, walked with a strong stride, and spoke loudly and directly. The guys treated her like one of the boys. The girls thought she “had zero femininity.”

“Takahashi won again!”
“Is she actually a guy? Her strength is crazy.”

No one had ever seen her blush. No one had ever seen her act soft.

Only I knew that this girl everyone treated like a tomboy would, in private, willingly kneel in front of me, press her face against my leg, and say in a completely different voice:

“Master… Aoi is your slutty bitch.”

Chapter 2: The Other Face After School

Every day after training, she would sprint to my rented apartment as fast as possible.

The moment she stepped inside, she locked the door and dropped to her knees in the entryway. She hadn’t even taken off her tracksuit yet; sweat had already soaked through her sports bra. She looked up, and the sharp eyes from daytime instantly turned wet and submissive.

“Master, people called me a tomboy again today… Can you please use Aoi like a bitch?”

I said nothing, only pointed at the floor.
She immediately pulled her sweatpants and panties down to her knees, braced her hands on the ground, and raised her firm, well-trained ass high. Then she used her own fingers to spread her already dripping entrance.

“Please inspect… Aoi’s slutty hole is ready.”

When I pushed into her from behind, the sound she made was nothing like her usual self — soft, lewd, and edged with tears.

“Ah… Master’s cock… so hot… so deep… At school I’m a tomboy, but right now I’m being fucked like a bitch… It’s so embarrassing… but it feels so good…”

Chapter 3: Detailed Training and Long Sex Sessions

That day I decided to use her thoroughly.

I kept her on her knees, first stretching her with four fingers before sinking all the way in. Inside she was hot and tight; her walls clenched rhythmically with every wave of pleasure. I grabbed her ponytail and pulled her head back, forcing her to look at herself in the mirror.

“Look at yourself right now. The ace of the track team, on all fours getting fucked.”

“Yes… Aoi is… Master’s meat toilet… Ah…! Right there… too deep…”

I started thrusting hard and deep. Her ass cheeks turned red from the impact, and juices ran down her thighs onto the floor. At first she could still hold herself up, but soon her arms gave out and her upper body collapsed to the floor, leaving only her hips pushing back to meet me.

I changed positions several times:
First doggy, then I made her turn around and ride me. Her core and thigh muscles let her bounce for a long time, her surprisingly full breasts swaying in front of my face. She cried while talking dirty on her own:

“Everyone… treats Aoi like a guy… but right now Aoi’s insides… are being filled with Master’s cum… Aoi is… only Master’s slutty bitch…”

That session lasted more than two hours. She came seven times; twice she squirted hard enough to soak the sheets. When I finally came deep inside her, her whole body convulsed, eyes rolling back, still managing to say in broken breaths, “Thank you, Master… for giving Aoi your cum…”

Chapter 4: Secrets in Daily Life and More Sex

The relationship only intensified after that.

One time she came straight after an important school meet, still wearing her spikes and race bib. The moment she entered she bent over the dining table, pulled her competition shorts to the side, and looked back at me with wet eyes:

“Master… Aoi got first place today… so I want to be fucked until I can’t stand tomorrow…”

When I entered her from behind, her body was still trembling slightly from the intense race. She was burning hot inside. I deliberately slowed down so she could feel every inch filling her, while my hand rubbed her swollen clit.

“Ah…! Don’t do both at the same time… Aoi will break…”

Her voice no longer sounded anything like the loud tomboy from the track. When I sped up, she started babbling incoherently, even grabbing my hand to beg me to go harder.

That night I came three times. By the last round she could barely speak, only lying weakly on the table while her hole kept twitching and pushing out cum, smiling foolishly as she murmured, “So full… Aoi’s belly feels so warm…”

Chapter 5: The Ending No One Would Ever Guess

Half a year later.

Aoi won the regional championship and was selected for the provincial team. She would soon leave the city for intensive training. Everyone was congratulating “that tomboy Takahashi” on finally making it big.

On the last night before she left, she came to me. We did it for a long time as usual. She cried through her orgasms and finally collapsed on the bed, covered in sweat and cum.

I thought she would say the same thing as always: “Aoi will forever be Master’s slutty bitch.”

Instead she suddenly pushed herself up, looked at me with a calm expression I had never seen before, and gave a small smile.

“Actually… from the very beginning, I was the one who seduced you.”

I froze.

She reached into her bag and took out a small voice recorder and a document.

“I have a serious exhibitionism and humiliation fetish. But I couldn’t let the school, the coaches, or my family find out. So I chose you. Someone who looked ordinary, who wouldn’t talk, and who happened to be interested in me.”

She pushed the papers toward me. It was a signed consent form, along with a transfer record — every month she had been anonymously sending a “training fee” to my account from her part-time job money.

“I was willing the entire time. And…” She paused, and for the first time real vulnerability appeared in her eyes. “I fell in love with you. Not because you’re Master, but because you accepted this version of me — the one who wants to be a tomboy and a slutty dog at the same time.”

She crawled closer. This time she didn’t kneel. She simply hugged me.

“I’ve already told the provincial team coach that I have a steady partner and will need to come back regularly. So… will you keep being my owner? Not in secret, but for real.”

Then the girl whom everyone saw as endlessly strong and masculine buried her face in my shoulder and whispered so quietly it was almost inaudible:

“I can still be a tomboy during the day and your slutty bitch at night. But this time… I want you to belong to me too.”

I never expected that the one who would finally expose the secret and push the relationship into the open would be her.

And I especially never expected that I would nod.