Magical Kitsune!

He decided to go for magic, with that in mind he knew what to do, fuck her and focus on playing with her breasts, and butt. "Turn around Miyu." He ordered his new Kitsune, she gave a chirping trill and did as told turning around and presenting her butt. Right now it wasn't much but as her magic stats went up it would grow larger and larger. Much like in most monster collecting games Monster Girls did have a level limit. Though it wasn't too high, it maxed at 69, as to how one knew this the easiest way was with a Mon-Scanner, a device that could accurately determine a monster girls power, level, and stats. Currently Miyu was level 1, as she had been born and raised by John from her mother. Her father had been a professional monster girl tamer, and had actually impregnated all of his monster girls before retiring. Now he lived with his monster girls who cared for and loved him. John was given Miyu by her mother as she sensed that he would treat her right. Which he did he waited till she was old enough to begin the monster training, which was 18. Once 18 all monster girls would undergo a transformation into their 'Teenage' battle form. Before that they resembled a typical human child but usually with some trait to show they weren't human. For Kitsune this was their fox ears and tails. Once in their teenage form they would be strong enough to officially fight, thus began their training and stat building.

Speaking of it was time to get to that. He walked up to Miyu who was shaking her butt side to side, her tail swishing provocatively. He grabbed her butt caressing it as he got closer. Once close enough lined his huge cock to her pussy and slid it in slow, as he did he reached for her breasts and began to play with them squeezing her nipples and twisting them slightly. She trilled, "Mmmmmore!" she felt her master's dick inside of her, going all the way to her cervix. He had inserted 10 inches of hot cock meat into her, and still had 10 more to go. He began to hump her, pulling his dick out to thrust it back in. He did this slowly and carefully so as to keep her magical stats increase as the main focus. As he did this he kept playing with her breasts mashing, pulling and caressing them. After several seconds of this he felt her breasts start to swell up, confirmation that her stats were going up.

Miyu moaned with pleasure as she felt the change occurring her breasts growing larger as did her butt! It wasn't exactly massive growth but small and gradual growth. Miyu concentrated causing her cervix to open allowing John's cock into her womb. He felt his cock slide in and began to up his speed a bit, his hips meeting her hips with soft clapping of flesh. She orgasmed when she felt him speed up his thrusts, which would cause a slight surge of growth for her bust and butt. Causing them to go up dramatically larger. This was a rare phenomenon when a monster girl achieved orgasm it was possible she would get a surge in stats, it was known as the Orgasm Boost, it didn't always activate even if one should achieve there was no real way to know if a monster girl could even achieve it. At least not for normal folks, John would know and he also knew how many times it would activate. Miyu had her first Orgasm Boost, and would have her next one occur after her first evolution, and one final one when she fully evolved into a Kyuubi no Kitsune.

He was eager to see how big she would become at the end. He kept fucking her hard his dick bulging and his balls swelling ready to pump his seed into her. He clenched onto her breasts and pulled her up, he shifted his hands so that he was holding her up by her butt. He stood up tall thrusting up into. Miyu orgasmed again as his dick punched into her womb pushing it up against her skin only to recede as he pulled out. He did 3 more hard thrusts then a final thrust inside letting out all his seed into her. She trilled with delight as the cum filled her womb, pregnancy was not an issue, a monster girl could only be impregnated either when they achieved their final evolution or lived to the age of 30. His cocked pumped in enough seed that her belly began to inflate, swelling larger and larger, when he stopped her belly looked like she was pregnant with twins. He pulled his still rock hard dick out, cum splattering out from her spread vagina along with her love juices before being closed. He carried her to a mirror so she could see herself. Her breasts had gone from modest C-cups to sizable DD-Cups. Her butt had gone from 10 inches across to 20 inches across, and per the trait of magical based monster girls glowing blue mystic runes appeared on her face, areola and vagina also her eyes glowed a slight blue. Miyu and John were both ready for more but that would wait for a meal and her scan with the Mon-Scanner.

John set her down onto the bed, "Rest up I'll be right back." he told her and she nodded rubbing her belly. He left to make her meal, Miyu was both proud and happy to have a master like John she loved him dearly and hoped to have his young when she was ready for children. For now she would rest and think of her future body.

-One Hour Later-

Miyu ate with gusto John had prepared for her a fruit salad with cottage cheese. Like humans monster girls had certain preferences towards foods. But as they developed their stats those preferences would change to better help them grow stronger. Miyu preferred meat and fish but over time she would develop a taste for fruit and vegetables. How long it took was another matter altogether. While she ate John held up the Mon-Pad, a tablet with a camera on the back of it, he activated the scanning program. He held it up and it scanned Miyu, and it scanned her and began displaying her information.

*Name: Miyu
*Age: 18
*Level: 3
*HP: 95
*STR: 10
*MAG: 19
*DEF: 9
*RES: 14

The EXP was rising as it would so long as she kept eating. In order for her to evolve she would need to reach level 12, to become a 3-Tailed Kitsune level 28 to become 6-Tailed, and finally level 42 to become a Kyuubi no Kitsune. He had a long road ahead, and he would need to tame other monster girls in order to have a party to handle other monster girls. Which meant his next action was important. Should he go find a new monster girl to add into the party or work on making Miyu much stronger?