Chojusen started the "month" of training by improving Karin and Inos' physiques. They were already quite advanced for twelve-year-olds, but improving the foundation was always step number one. Chojusen also didn't let them of the hook because they were his girlfriends; he thoroughly trained each and every muscle and bone group on their bodies.
Chojusen gave them gravity seals that could now go up to 100 time gravity. Whenever the girls got tired, Chojusen would heal them with his various reality breaking restoration techniques. It turns out that being able to train endlessly at peak proficiency allowed the girls to make impossible levels of progress.
Before the training began, Ino and Karin could only take about five times regular gravity without breaking down. But after the first day of training, they could ramp up the difficulty to seven times gravity. At first, the girls were very annoyed and hesitant to continue this borderline torture of a training camp. However, Chojusen's "service" made them reconsider; he didn't want to be too hard on them, so he worked in a nice little massage when he was healing them with his Yang Rebirh Skill or any other healing technique.
The first day of training was the worst for the girls, but they quickly adapted to Chojusen's absurd training schedule. It was on the second day however, where the first of many "happy" encounters took place. Chojusen didn't want to immediately push Ino and Karin to his ridiculous standard of training every waking moment of the day, so he didn't use Yang Rebirth to keep them awake and training around the clock; he gave them the night cycle of his personal dimension to sleep and rest.
During the time they slept, Chojusen would train with his army of clones, he would go to the outside world and look for wild beasts to hunt and cook for his girlfriends, and he would also take care of his hygiene. On the very first night that Ino and Karin spent in his personal dimension, Chojusen thought it would be a good time to take a bath. There wasn't a working electric shower in his wooden cabin as that was just for sleeping, so he had to bathe in the lake.
Chojusen thought about many things while he cleaned himself in the lake, but eventually he began to think about the future. As his thoughts drifted and his consciousness blurred, he floated in a most carefree manner around the lake. As he floated in the lake, the waves pushed him and he crashed into something… soft and supple. Chojusen didn't immediately leave his relaxed state, he was in his own dimension so there was nothing to worry about; or so he thought.
Eventually, Chojusen noticed that the waves no longer carried him. Finally coming back to reality, Chojusen noticed that he was stopped by a shocked and completely naked Karin. Both Chojusen and Karin stared at each other. Neither of them felt odd being exposed in front of each other; if anything it reminded them of that time in the hotspring.
Karin had already passed puberty and looking at Chojusen now made her subconsciously crave him. However, she noticed that Chojusen didn't appear to feel the same way as his little brother wasn't acting up. She thought that this was a sign that he wasn't interested in her; how wrong she was…
Chojusen was just starting to go through puberty so looking at Karin completely naked and so close up… he very much wanted to eat her alive. However, his father had taught him a bit more about adult matters, especially how he should never force himself onto a woman. Choza taught him that very few things were as heinous as a sexual deviant.
Chojusen, knowing how easily he could overpower Karin, didn't want to force her, so he would wait for her to make the first move. Unfortunately, his first sexual experience would have to involve the girl taking the initiative or Chojusen would never understand how to take the initiative without forcing those he was interested in.
And so Chojusen just stayed there, bathing in the lake. Since Karin didn't make a move, Chojusen returned to training with his army of clones until Ino woke up to start another day of training.
Another month of training passed before Ino caught Karin and Chojusen bathing together at night. She had been bathing before Karin, thinking that they were taking turns. You can imagine how flustered she became watching Karin and Chojusen casually bath together. However, since no one did anything, nothing happened. She also got used to bathing naked with Chojusen...
Three more months passed and Chojusen determined that Ino and Karin's physiques had improved enough to start focusing on ninjutsu. The first ninjutsu skill Chojusen taught them was his cloning method; it wasn't exactly the same as a shadow clone, so he didn't tell that it was the shadow clone jutsu.
After a month of training the cloning method, Karin and Ino could make up to 50 clones; Chojusen's Yin Rebirth also played a major role in dramatically improving the girls' chakra reserves. With these clones, the girls would be able to learn all the other skills he wanted to teach them at an even more ridiculous pace.
At this point Chojusen started teaching them some of his more ridiculous abilities. Karin had affinity for Water, Earth, Time, and Yin, while Ino had affinity for Fire, Lightning, Time, and Yin. It was unfortunate that neither of the two girls had affinity with space or yang — what Chojusen liked to practice the most — but Chojusen still had a couple tricks he could teach them.
Chojusen taught Karin his Water Bullet, Water Healing, Earth Lance, Temporal Restoration, Yin Rebirth, and Earth and Water Elemental Creation and Elemental Coating Skills. While Ino was taught Chojusen's Flame Bullet, Lightning Javelin, Temporal Restoration, Yin Rebirth, and Fire and Lightning Elemental Creation and Elemental Coating Skills.
For the next four years in Chojusen's personal dimension, the girls trained their bodies and skills. At around the second year mark, Chojusen started to get them training even through the night, and their absurd rate of progress was even further emphasized.
During this time, Ino's parents and Karin's mom visited them in Chojusen's house and Ino and Karin would greet them with one of their clones. To not let suspicions arise, Chojusen taught the girls his Transformation skill; it was also the reason no one looked at him funny after opening his nine hidden gates permanently and gaining a perfectly mature body.
On the third year of training, Chojusen taught the girls how to enter Sage Mode and Elemental Sage Mode. Unfortunately neither of the two girls had the talent or affinity to join the Butterfly clan and become Butterfly Sages, especially since they couldn't use Yang Rebirth.
On the fourth year, Chojusen began helping the girls open their hidden gates. With the training they had leading up to this moment, both girls could open up to the fifth gate permanently, and enter up to the seventh gate if they needed to for whatever reason. Needless to say, with the gates opening and the gravity seals training their bodies, Ino and Karin developed even more than they should have for the time they spent in Chojusen's personal dimension.
However, the girls didn't grow to be hulking masses of muscles. No. Just like Chojusen and Lee, they became even more fit and their muscles toned. Surprisingly, their curvy figures were actually highlighted by opening their hidden gates, so their rumps and chests were emphasized all the more. They didn't develop calluses or rough skin. Instead, their flesh and skin were supple and firm like bread dough, ready for baking. To match the ever growing girls, Chojusen slowly undid his transformation to compliment their adult figures.
As the years passed, Chojusen learned that teaching others was a great way for him to make progress as well. His understanding of law principles and energy in general had made some progress as he taught Karin and Ino what he knew.
…
A couple days before the five year period for Ino and Karin's training came up. Karin couldn't hold herself together anymore. She had endured all these years, bathing with Chojusen with nothing happening between them. It was an endless frustration that she couldn't contain anymore. Training with Yin energy certainly did not help her case as her source yin was uncomfortably craving Chojusen's source yang.
Looking at him naked every single day, just there for the taking was like staring the mirage of an oasis while thirsty for water in the desert, but the mirage would move away as she approached. She felt like the Shukaku in Gaara's old seal, and Chojusen's ripe and perfect yang was the air that could help her escape her insanity.
Today, she finally couldn't take it anymore, and as Chojusen was calmly floating in the lake like he had for the five years, she pounced on him. With a blazingly hot face and a crazed look in her eyes, she said "Chojusen… I can't help myself any longer..."