The is a fictional story where goku has a sister name ruta so enjoy
Roshi arrives at planet yardrat in hopes of learn the instant transmission. As soon as he arrives there he is greeted by the inhabitants and began his training. 3 months have passed and he has finally learned the technique.
As soon as he is about to enter the time machine he is greeted by a young girl with a tail.
A saiyan he says he approaches the girl and ask her who she is.
She introduces herself her name is ruta she is seventeen years old, her mother and father are gine and bardock and her siblings are kakarot,Radditz,Tia and koruda.
Roshi was shocked goku family are alive he then tooks in Ruta's appearance. She is wearing a blue headband a black top that exposes her midriff black leggings and black shoes.
She then sensed roshi's power and had sparkles her eye she said wow mister your power is huge could you train me she exclaimed
Roshi then had a mischievous idea he sure but you have to do everything I say he asked if she knew what was sex but she said if that's some kind of training.
Roshi told her That training starts now ruta was jumping up and down excitedly roshi told her to strip down until she in her bra and panties.
She said ok and proceeded to strip down first she took off her black top exposing her black bra next she took off her shoes leaving her barefooted.
Next Ruta took off her black leggings showing her black panties.
Roshi was nodding good he said and approached ruta he grabs her bra and takes it off revealing her breast he grabs her breast and sucked on it ruta then moan she asked in shaking voice what is this master.
Roshi said its to test her body.
She nodes and this continued for two minutes when he stops Ruta ask what is next.
Roshi said the next test is pain endurance he grabs ruta panties and pulls it off revealing her womanhood he sticks a finger in ruta pussy earning a moan he stops and use his buff form.
Ruta eyes widen this power level its unreal he pulls down his pants to show his monster dick.
He turned ruta around and sticks his dick in her pussy ruta grasp her eyes watering roshi then begins to hump her his meat slapping against her.
Ruta eyes rolled her tongue sticking out she was moaning so loud this continued for half a hour until roshi cummed in her.
Ruta was tired she was on the brink of passing out the last thing she hears a good job ruta and she passes out.
He then went to earth in search of koruda