Today at school, Issei thought he would have a regular day. He breezed through the first couple classes like always. However, when the time for Physical Education came up, a couple guys approached him. Issei was now well known for his insane exercising, which made most of his peers intimidated.
Today it seemed that the guys wanted to take a gamble and see if they could convince Issei to join a sports club. But they couldn't just have him join a sports club, they needed to see if he was good at sports first; there was a big difference between being good at sports and being good at exercising.
Issei was asked to join his classmates for a game of baseball. He had no idea what baseball was, so the his peers explained it to them. Seeing that Issei had no clue what baseball was, made most people in the baseball club hopeless, but they wished to see if he had any potential.
Issei agreed to play a quick game. He was interested in these sports as they didn't exist in his previous world. Besides, playing sports should count as exercise on his body, if he kept the gravity on himself amplified.
Issei was given the fourth batting position, so that he could see how others swung their bats first. The people in front of Issei all hit singles, so when it was his turn, all the bases were loaded.
Issei took a bat, which was just a staff in his eyes and readied himself to hit the ball. He didn't even have to use his Fiendgod Eyes to see the unbelievably slow ball travelling at him at several hundred kilometers per hour. When Issei's bat made contact with the ball, a loud DING noise was the only thing people perceived, as the ball travelled so far and so high, that no one could find the ball even after days of searching.
Issei made a grand slam, causing all the baseball club members to look at him with stars in their eyes, but he was disappointed. According to the rules of baseball, he would only have a turn after everyone else, meaning he could only exercise after everyone got a turn or when they switched to the outfield, where he could run when the ball came his direction.
Issei finished playing this game of baseball with his peers, but after the game, he told them that he wasn't interested in joining their club; his excuse was that he was already a part of the Occult Research Club. As Issei left to go change his clothes in disappointment for wasting his time playing baseball, a certain white-haired loli gazed at him with interest.
Issei finished the school day normally after Physical Education and then went to the Occult Research Club. He was excited to talk to Akeno and perhaps increase his understanding of holy and demonic energies.
However, after he entered the club and waited for Rias to finish her daily shower, a wild Koneko appeared! Koneko was antisocial; at least that was what Issei thought, since she never showed emotions and would only convey enough words to give you what you wanted.
Koneko looked at Issei a bit bothered and said "Today… in P.E… you… you were strong..."
"Ok?"
"Can you… teach me how… you became so strong?"
"So you want to increase your physical strength?"
Koneko nodded her head slightly; she was a bit ashamed to be asking this person for favors.
Issei asked "How do you train normally?"
"Magic Body Refining..."
Issei was stunned to see that this skill existed in this universe as well. All this time he had been trying to use the body refining of his past universe to no avail. No new skill would appear, but he could make some progress by simulating the effects of the previous universe's body refining skill.
Issei said "Lets make a deal. If you teach me your Magic Body Refining I will give you Gravity Seals to help increase how quickly you improve your strength."
Koneko nodded again and told Issei how she used Magic Body Refining. After Koneko's explanation and demonstration of Magic Body Refining, Issei could only facepalm at his own stupidity. Issei had been doing it completely wrong since he got to this world.
How could he not have realized that there was no point in revolving the energy across his body, now that there were no chakra points to absorb his energy. To make a useful or at least efficient body refining skill in this universe, Issei had to adapt his application of energy to his new body; in other words, he would stop revolving energy across his body and flare his energy for a long period of time so that his body could slowly absorb it.
Issei tried to apply the technique he theorized and he succeeded in creating a new Body Refining Method.
[Host has learned the skill: Magic Body Refinement
Magic Body Refinement (Rank B | 0/100): By flaring the user's energy from the inside out, the user's body can absorb a portion of the energy he emits. The higher the mastery of this skill, the less energy is lost while flaring. Current Effect: 7.5% of the energy flared will be absorbed by the body.]
Issei thanked Koneko profusely as he never expected to learn something so useful and critical from her and then began to fulfill his end of the deal. He created a Gravity Seal that can go up to 20 times regular gravity and asked Koneko where she wanted the seal to be branded. Koneko though he meant that the seal had to be branded on her body, a thought that made her a bit flustered.
After a lengthy period of internal debate, Koneko made up her mind. She lifted up her shirt and told Issei to put the seal on her back. Issei didn't flinch and just directly completed his mission; he didn't even physically touch her, as he could see that the very act would make her very uncomfortable.
Koneko had no idea that the process was done as she never felt his touch. It was only when Issei said "You can cover up now. I already put the seal on your body. Remember, that the seal can only go up to twenty times normal gravity, so if you ever surpass that level of pressure come back to me and I'll probably have a better seal by then."
Koneko was a bit disappointed and she didn't even know why. She just looked at Issei with complicated eyes and moved on. Before she left, Issei said "Oh, and if you ever need a sparring partner, I'd be more than happy to participate. I can't let a training buddy go so easily. You know?"
Somehow, this comment lifted Koneko's spirits and she gave Issei the slightest smile possible. A couple moments later, a naked Rias showed up and started dressing herself right in front of Issei and Koneko. When Kiba and Akeno made it to the club room, Rias began her briefing for today.
She said "Well, the next full moon is coming up, so I think it's about time for you to get a familiar." She looked at Issei as she said this.
Issei said "What is a familiar?"
Rias and the rest of the club members lifted their hands to summon little demon creatures. Rias had a little bat demon, Akeno had an imp, Kiba had a bird, and Koneko had a cat. Rias said "These little guys can make a break a devil in the underworld. They each have their own abilities which help us, especially after they mature."
"A Familiar?" Issei called for the system and asked "Hey system, can I get Chokogo here as my familiar."
[Usually that would not be possible, but you guys have a special relationship and with your new bloodlines, I can make it happen. But it will cost you 10,000 shop points.]
"Alright. What's the plan?"
[So, the first thing you need to do is go into your personal dimension. There, Chokogo can survive long enough for the process to be complete without the universe annihilating her soul. Then with the 10,000 shop points, I will remove the pawn pieces inside of your body and you can study them create new accessories, which can reincarnate whoever you want into a Nephilim, Chaosfiend, or Fiendgod.
Chokogo is already part Fiendgod since she synchronized with your Fiendgod Butterfly Sage Mode, so that is the best option to go with. Reincarnating her will also shift her bloodline to be more complete, meaning that if you use the Fiendgod abilities with her, they will be all the more potent.]
Issei returned to the real world and went along with Rias' plan. Even though his familiar would be his trusty world-class body-pillo… Butterfly companion, he wanted to see what this pet master and pet dimension where all about.
After telling Issei that they would go to the pet dimension on the night of the full moon, Rias tried to give Issei some more contracts to help him increase his standing as a devil. But, Issei had enough of these meaningless chores, and politely refused. Rias couldn't really do anything to Issei, and her "chores" were only for him to increase his reputation in the underground world.
After Issei left the Occult Research Club, he made his way to the place where he would meet with Asia to take care of her living arrangements.