Tia is a fictional character who is goku sister,she about the same age as Ruta.
Roshi arrived on a planet that look like namek he had a plan to gather the dragon balls and wish for his youth. He got out and began his search after a while he got all the dragon balls and wished for his youth.
Roshi looked at himself in aww his power has jump dramatically but he couldn't use his buff form he ask porunga to make him a saiyan after making the wish he told porunga he can go he was about to go to his time machine when suddenly a voice called out.
He turned behind to see a saiyan female she long shaggy hair light blue eyes she wore the standard armor black leggings and boots.
She looked at Roshi and said are you master roshi? My sister Ruta told me about the training you did and I want to join.
Ahh so you are ruta sister ok I'll train you but you have to pass a test just like you sister he said
Tia nodded and roshi said ( ok first I want you to strip until you in your bra and panties) he said.
Tia said yes and began to strip down. She removed her saiyan armor leaving her in a blue training bra. She took off her black leggings to reveal her blue panties.
Roshi nodded and went behind and took off her bra letting her breast plop free he took one of her breasts and sucked on it.
Tia moaned and said (ah is that all you got) Roshi chuckled and thought it's a perfect time to use his new power up.
Tia's eyes widen his keeps growing higher and higher, his hair turning gold and with a primal scream he has reached super saiyan.
Roshi grabbed Tia's blue panties leaving her naked with one swift move he removed his pants to show his dick and pushed it in Tia tight pussy.
Tia screamed blood dripping from her pussy tears were running down her face roshi was thrusting into her at such a speed she cummed four times and with on last thrust he cummed in her.
Tia said panting( so .. .much….cum) and she passed out.
Roshi pulled up his pants his pants and was about to leave when he heard a voice( my baby what did you do)