Lesson

The opening of the school was over, and everyone had helped Sona to manage this school while cleaning it since she didn't have a helper in this school.

It was quite surprising that the school was being opened by high school students, however, if they only taught them how to fight in the Rating Game then it was very easy since all of them were quite strong and they had fought a lot of strong opponents in the past.

But if they were being told to teach something general such as mathematic, biology, physics, etiquette, or the lesson which was important in daily life then they couldn't do it since their knowledge about that matter was limited compared to the professor who had learned about such a matter in their lifetime.

However, they were lucky that Yuuki and Rossweisse were here since he could teach them about a lesson such as mathematics, physics, and a more general lesson that was told in human's world.

This lesson might seem quite unnecessary for some of them, but not all of the children in this place had a dream to become a champion of the Rating Game, and some of them wanted to work in the research place or in the hospital to become a very good doctor.

Sona, who heard Yuuki's opinion, also knew that it would be a trouble if she didn't invite a teacher who could teach those children general knowledge. She looked at Yuuki and felt more and more wanted him to be with her helping her, however, she was afraid that he would reject her. She could only shut her mouth and buried what she wanted to say deep waiting for the right moment.

Then when the children had come to the school once again everyone started to teach them a lesson, especially Kiba and Sairorg who taught those children swordsmanship and martial art.

Issei didn't teach them anything, however, he was being asked by a lot of children how to become "Oppai Dragon" and "Is Oppai good?". Of course, when he was being asked that question, he started to preach to them how good "Oppai" was and how wonderful it was.

Then the children heard Issei's words as if had been hit by enlightened.

Yuuki looked at Issei and wondered whether this guy wanted to build a cult.

"Sona seems to want to say something to you," Rias said.

"Well?" Yuuki looked at Rias curiously.

Rias looked at Yuuki and said, "Sona is my childhood friend, and I can tell that she wants to ask you something, but she is holding back because of something."

Yuuki rubbed his nose and said, "I could tell that she wanted to invite me to make this school become better together."

"Then why not help her?" Rias asked. She knew that Yuuki was very smart, especially in terms of business management.

"I'm quite busy right now, I don't want to help her with half-assed feeling...." Yuuki said with a serious expression. His time was limited and for him to give up his time to stay with his girlfriends and stay with Sona to build this school was something that very hard to do. His intention to start a business was to make him able to spend his day together with his girlfriends without trouble.

For his business, he could let the professional manage it and his team to watch over those professionals.

"How about you?" Yuuki asked.

Rias shook her head and said, "Building a school isn't my dream."

"Then, what is your dream?" Yuuki asked.

"My dream is to succeed Gremory Clan and become a great clan head," Rias said.

"For me, you have succeeded in becoming a King for everyone in your peerage." Yuuki smiled and said, "Then, a great clan head is just a matter of time."

Rias smiled sweetly and said, "Thank you."

"No problem, however, if you're too busy, you won't have a chance to meet the right person in the future," Yuuki said.

"Oh? Then should I search for the right person right now when I'm not that busy?" Rias asked with a smile.

"We have a promise for a date, however, we haven't done it," Yuuki said with a regretful expression.

"Yeah...." Rias also sighed.

Both of them were quite busy and it was very hard to find the right time to go out together.

Yuuki thought for a while and said, "Well, we're still young, we have a lot of time."

Rias nodded and said, "That's true."

If someone heard their conversation then they would have never thought that both of them were high school students.

"However...." Yuuki suddenly said.

"However?" Rias looked at Yuuki curiously.

"If you want, we can skip the date and the do the advance things to see whether we're a match or not," Yuuki said.

"Advance things?" Rias raised her eyebrow.

"Well...." Yuuki moved closer and whispered something to her.

Rias shuddered and felt a bit weak when Yuuki moved closer to her ear. Her body was a bit weak, especially when she heard his words. Her face turned red as her hair. "Y - You pervert!"

"I was joking," Yuuki said with a smile.

However, Rias didn't really mind about this matter since a date between the two of them was just a pretext or just a catalyst for both of them to change their relationship deeper.

Yuuki thought that Rias was angry since she didn't say anything, however, it seemed that wasn't the case.

Rias tucked his shirt and said, "Well, how about we go out tonight?"

Yuuki's eyes brightened up when he heard this invitation.

However, when Rias and Yuuki talked about their date tonight, suddenly they felt a creepy feeling, and the unique purple sky in the Underworld turned white.

"What's happening?" Rias said with a serious expression.

"....."

Yuuki sighed and felt depressed when he thought that he was once again being disturbed. Then suddenly he felt there was a notice inside his head and knew that there was a quest.