The energy for the Dimensional Portal recharges on its own over time, but it's also related to Luo Guang's own strength. The stronger he becomes, the faster the energy replenishes. He can also restore energy by fighting certain enemies. There might be other methods as well, but Luo Guang wasn't in a hurry to go to the world of Campione!, so he hadn't paid much attention.
The reason he wasn't in a rush to return to the world of Campione! was that it was too dangerous. The power of a Campione and an Unruly God was at the absolute top of that world's hierarchy. Even with Luo Guang's strength at the level of a high-ranking Great Knight, he was still an ant compared to a god or a Campione. He could be killed without even knowing how.
As for killing a god, Luo Guang had considered it, but he knew the gap between himself and an Unruly God. Of course, besides a head-on fight, there might be other ways. For example, he could be on a morning jog and accidentally kick a god in a corner, killing it and completing his transformation. This wasn't impossible, as most Campiones killed their first god by taking advantage of a loophole or by sheer coincidence. The chance of a mortal defeating a god in a head-on fight was zero.
So, when Luo Guang felt he had reached a sufficient level of strength, he left that world. If he were to be caught in a god's territory, he would be completely helpless.
In the world of High School DxD, although things were chaotic, chaos was still a form of order. Now, Luo Guang had a new hope for the world of Campione!. With his current skills and a Longinus, he might have a chance to kill a god in a head-on fight. If he could become a Campione, his life would be much easier. Even in the world of High School DxD, he would be among the strongest.
After leaving the Occult Research Club, Luo Guang began to think about his next plans. He would interfere in key events from the original plot, take on commissions, and continue his daily training. In his free time, he could also tease Est. Life was quite fulfilling.
However, Eriri, who had returned to her classroom, was even more displeased with Luo Guang. He was getting too close to the popular girls at school, which made Eriri wonder about their relationship.
"Could it be that Luo Guang is being blackmailed and has to obey those cow-women?"
"Is the real reason they call him over just to do this and that to him?"
As a fan manga artist, Eriri immediately came up with a classic school bullying story in her head. The only difference was that the roles in her story were reversed.
"No, no, that can't be right. Luo Guang is too amazing to be bullied."
Eriri shook her head, her golden twin tails swaying back and forth like a metronome. But the more she thought about it, the more her creativity soared. If she weren't at school, she wouldn't be able to control her creative urge and would have already drawn the scenes in her head.
"I'll go home and ask my mother."
Finally, Eriri got back on track, thinking about how to discuss with her mother on how to get Luo Guang's attention back.
The afternoon classes passed quickly. After their homeroom teacher, Mafuyu Kirisu, coldly handed back their graded tests, the students were a bit dejected. But they returned to their normal selves after school.
Luo Guang went home as usual, made dinner, and ate with Est. Looking at Est, who ate like a little kitten, Luo Guang affectionately stroked her hair and said, "I'm going to train. You can watch TV after you're done eating."
"Okay, Luo Guang," Est said without lifting her head.
The reason she called him by his name was due to her personality. It made her feel closer to him. If she were to call him "Master," it would mean that she was angry.
Luo Guang went to the backyard of his villa to study Immortal Arts. Immortal Aura, also known as Immortal Qi, was the foundation of Immortal Arts. Unlike magical power and the power of light, it had no direct destructive power, but it had many other functions.
Even without a systematic cultivation method, Luo Guang wanted to figure out some basic Immortal Arts on his own. Under the moonlight, a faint white aura appeared on Luo Guang's body. That was his Immortal Aura, which looked gentle and sacred.
After about an hour, Luo Guang finally began to see a few things, and based on his Immortal Aura, he comprehended a few basic Immortal Arts. Besides making his senses sharper, he could now weaken or even erase curses, negative status effects, and perform basic healing.
"Not bad," Luo Guang said, opening his eyes with a satisfied smile.
With his Diligence Rewards ability, anything he did yielded twice the results.
Just then, he felt a burning sensation from his shirt pocket. Luo Guang took out the glowing crest and saw that the crest Sona Sitri had given him that morning was now vibrating.