When Felice heard about it, she widened her eyes and drew a gasp, looking at Kai with a dumbfounded expression.

Kai himself thought it was just a normal secret since it would be fine if humanity knew that Magic Power was actually a Magic Particle that was far smaller than an atom. As long as they didn't know anything about protectors and such, they should be fine.

"Big Brother already knows about it?" Felice asked, feeling unsure.

"Yep. Let's say I know more than you and the government." Kai smirked. "I am not lying to you just to make you interested in this matter."

Although she still doubted this secret, Kai didn't have any reason to lie, so she decided to trust him for the time being. This should keep her going for a few years. "I understand. The challenge is on. I'm going to prove that I can decipher Big Brother's magic."

The only reason he allowed Felice to learn about this was his belief in a genius like her. Her analytical skill was superb, so he thought her research would teach him something about his Sound Magic, allowing him to understand another Sound Magic.

He patted her head again while Felice giggled, looking at Kai like her own brother. She didn't know why but it was so easy to talk with Kai than any other people she had met this whole time. It might be the same reason why Ria clicked with Kai.

In fact, if Ria Ross were here, she might have asked Kai to take her as his student. But without her, Felice seemed to have the same intention as she said, "Big Brother… Can I change the reward? It's true that having known the answer to the Magic Power is exciting, I feel like I can be happier with Big Brother… So, I won't say anything about becoming your wife, but can I request to be your student? Of course, it's not about research or something, I want to learn how to fight too."

Kai fell silent and looked Felice in the eyes. "Are you sure? Why would you want to get stronger?"

"I just want to protect myself. At least, I won't be a burden to Big Sister if somehow we're targeted by people." She shrugged.

Kai contemplated for a moment and said, "I will consider it after you put in some effort."

Since Felice was lazing around this whole time because she was bored, he decided to give a test.

"The time limit is one year. I want you to impress me with your performance." Kai smirked.

Felice looked down and nodded. "I understand. I will show you my change in one year."

"Sure. Then, I will ask someone to let you meet the Poison Master. I want you to make sure you—"

Before he finished, Felice replied. "I won't stand out that much to the point I can't go anywhere. With my current background, it's indeed hard for me to leave this place if I'm becoming too important in Union's eyes. It's not like I have an attachment in this base anyway, so I don't mind relocating in the future.

"I will keep building my strength and research in a year before showing you something that can impress you."

Kai smiled and patted her head again. "I am looking forward to it."

"Hehe."

After learning with the kids, the food arrived. The meal was delicious and the atmosphere was cheerful the whole time. Felice remained silent while Sofia kept glancing at her, wondering what the two talked about earlier.

However, since Kai wanted to keep it a secret, she didn't press him with that matter, while Roselyn simply didn't watch him this whole time. There was no way she would know about this ambiguous relationship between Kai and Felice.

With how Felice acted to Kai, she simply looked like someone who adored him and wanted to get closer to him as if he was her idol.

Felice also didn't show anything excessive since she knew Roselyn was here to keep an eye on Kai. And it was at this time, they announced Roselyn's promotion.

The kids obviously felt happy for Roselyn since she deserved it. She had been the best Big Sister for them.

After eating, the kids took a bath. Roselyn and Sofia entered the bath with the girls before Kai and the boys used it.

Although they didn't stop laughing or shouting, Kai didn't mind at all and played with them in the water or washed their backs.

They had their fun and the fatigue had finally taken over them. Some of the younger ones were already sleepy as they returned to their rooms.

Unfortunately, it was also the time for Kai, Sofia, and Roselyn to return to the school.

Felice, Sonia, and all the kids, who were still awake, sent them off with smiles and waving hands.

Kai had given his contact information to Felice secretly. And this was also the only channel that could be used to send a message to the US Base without the Union knowing.

After returning to their room, Theo opened his device before Sofia couldn't contain her curiosity anymore.

"Who are you calling? It seems you have taken a liking to Felice…" Sofia asked while stretching her body on the bed.

Kai smiled and asked, "Jealous?"

"If it were the past me, I would have felt that way. But there is something in my heart telling me that I don't need to be jealous or anything. In fact, it only makes me look like an annoying b*tch. It must be something I've learned in the memory gap." Sofia shrugged.

"Hehe. Let's say that this kid is quite unique. I can understand her more than anyone else here." Kai smiled.

"She is like you?" She smiled.

"I believe so. Do you want to keep her here?" Kai smirked and looked at her, only to end up seeing her chest that was barely covered since she stretched her hand upward, raising her loose tank top.

"Hmm…" She thought for a moment and said, "If I say I won't, will you believe me?"

"Yes. Without hesitation." Kai made a genuine expression, showing it to her.

Sofia nodded with a smile. "Well, it's not like there is a benefit of keeping her here. If she can improve much faster with you, it's good for humanity. I don't know why but I feel our real enemy is not our rivalry or terrorist organizations. Instead, it's a whole different thing. I only know if we keep fighting each other, we will lose."

"You are not wrong." Kai confirmed her weird feeling and continued. "There is something you don't need to know for the time being. But they will surely come sooner or later. I believe it's within three years."

"So, that's why you put that limit?"

"Yes."

"Hmm… I understand. I don't know if I can help you or not, but I will do my best to help you during this time. I only want you to know I will be following you when you return to the US Base. I can't promise it will be done immediately, but I promise I will come back."

"Come back huh." Kai smiled and nodded. "Thanks."

"No need to mind. It's my decision." Sofia shrugged. "Anyway, you are calling someone?"

"Yes." Kai then showed the contact to Sofia and called him.

"Hello. Do you need anything from me?"

"Yeah. I would like to ask for a favor."

"Ho?" Arnaud seemed to be amused by this sudden call about favor. They didn't owe each other any favor. Even the earlier mission where Sofia and Roselyn ended up becoming the strongest agents in the EU Base had been paid because it was an agreement. Hence, Kai wanted to owe him a favor and it seemed to be personal. "I'm listening."

"Can you give a personal recommendation to the Poison Master? I would like to recommend someone to study under her."

Arnaud fell silent. "So, you are saying you want me to be this person's guarantor instead of you? You should know that your status alone is enough to ask for a favor from her, right?"

"Yeah. I don't want her to be seen that way for now."

Arnaud contemplated for a moment and said, "I understand. I will guarantee this person and ask the Poison Master to take in someone. Of course, I won't be responsible for this person's fate after that, okay? If this person runs away from the Poison Master, I won't say anything to make him/her stay."

"Yeah. It's fine."

"Still, I wonder who manages to catch your intention."

"You have been visiting the orphanage, right?"

"Yes."

"She is Felice."

"Oh? That lazy girl?" Arnaud was surprised to see Kai taking Felice seriously. From his impression, Felice seemed to have no ambition.

"That girl is pitiful." Kai simply said this sentence that could be easily misunderstood.

Arnaud decided not to pry it that much and said, "I understand. I will help you with her and promise you that I won't influence her or anything. But Just so you know, I won't take any responsibility if the Union puts her in their eyes."

"Yeah. I'm aware of the challenge. I will be leaving her in your hand."

"Sure."

After that call, Sofia remained silent and wondered what he saw from Felice. But since they would be together from now on, the answer would come sooner or later, so she decided not to ask.

The next day, they wandered around the school as Kai asked about the exoskeleton he ordered a few months ago.

Fortunately, she managed to fulfill his order and handed the exoskeleton to him when they met again. Kai quickly shipped the exoskeleton to Ayaka, so she could become stronger.

Then, without having anything to do, Kai only trained by himself as Sofia gave him some space while handling the school's matter and took the strength assessment as planned.