Crossover: Start by Signing In to the Infinite Dragon God

"Sister knew she was wrong, so I came to show my sincerity."

Serafall's eyes brimmed with tears. Ah~~ Sona-chan's body still felt so nice~~

"Sincerity?"

Sona asked in confusion. The reincarnation had already failed, so what kind of sincerity could there be?

"Mm-hmm!~~ Sister went to find Ajuka-chan! He can definitely solve Sona-chan's problem!~"

Serafall said confidently.

"Wait!~ Lady Serafall? The Ajuka-chan you mentioned... is Devil King Achuka?"

Rias was astonished. Was it really necessary to call upon a Lord King over the reincarnation of a single devil?

Uh... Su Yang seemed to have swallowed her Devil Chess Piece again just now, and there was still no sign of a successful reincarnation.

Yes! It was necessary! Very necessary!

But Lady Serafall definitely hadn't known earlier that she would try to reincarnate Su Yang as well, right?

In other words, Serafall had gone to seek out another Devil King merely because Sona's chess piece had failed to reincarnate someone?

Wasn't that a little too indulgent?

"Mm-hmm, that's right!~ Rias-chan... come out!~~ Ajuka-chan!~"

At Serafall's call, a green Magic Circle appeared on the floor of the Occult Research Club.

"Oh? This magic appeared in that crystal ball too."

Su Yang narrowed his eyes. Well, sorry, but he had learned this simple projection spell as well.

Under everyone's gaze, the phantom of a man appeared in the projection on the floor.

He looked quite gentle, with a glint of wisdom and intellect shining in his eyes.

The moment he appeared, he turned his gaze toward Su Yang.

"So you are the young man valued by the Next Head of the Sitri Family? I am Ajuka. If you do not mind, you may call me Teacher."

Ajuka said with a smile.

Yes, Teacher, not Master. He saw in Su Yang the potential to easily reach his own level.

Besides, a master-disciple relationship was far more intimate than that of teacher and student. In the Underworld, master-disciple bonds were held in high regard. One could not simply call themselves master and disciple just because one taught and the other learned.

"Mm, Teacher Achuka, what you taught is indeed very useful."

Su Yang nodded.

While he was still weak, the goodwill of a Transcendent was very important. After all, a Transcendent was still among the top few dozen combatants in this world.

What was more, Ajuka was highly compatible with him. With his learning ability and the immense spiritual energy required for his advancement, the best way for him to grow stronger in a short time was undoubtedly to learn all kinds of Magic Formulas.

After greeting Su Yang, Ajuka spoke to the two people involved.

"Rias and Sona, I already know the details. From now on, Yang-kun will be your shared Servant. There will be no issue writing this into the Devil Chess Piece system."

"Huh?" Rias's eyes widened.

"Hmm?!~" Sona raised an eyebrow.

"Of course, if you are dissatisfied, there are other options."

Ajuka smiled at their reactions.

"What options?" Sona asked, slightly agitated.

"I can collect unused Devil Chess Pieces from people in the Devil Realm. That way, Yang-kun should be able to reincarnate successfully and possess great power from the start. However..."

"However, Yang-kun would no longer be a Servant under our names, correct?" Sona adjusted her glasses. Fine, then they could abandon that option.

"Let's forget that."

Thinking the same as Sona, Rias immediately refused as well.

"Then it is settled. From now on, Yang-kun will be the shared Servant of Sona Sitri and Rias Gremory."

Their reactions were exactly as Ajuka had expected.

"Fine."

"No problem."

There was a trace of displeasure in both Rias and Sona's voices—not dissatisfaction with Ajuka's conclusion, but with each other.

Sona was unhappy because, had she known the reincarnation would fail, she never should have agreed to Rias's request just now! Then Yang-kun would have been her Servant!

Rias was unhappy because Sona's sister was far too shameless! If you had the ability, recruit a Servant directly like I did and speak plainly!~ Why did you have to stuff your little sister's Devil Chess Piece into someone else?~

"Rias Gremory, Sona Sitri, you will be remembered in the history of the Underworld because of this incompletely reincarnated devil."

Ajuka said seriously.

"Huh? Ajuka-chan? You're that certain?"

Serafall tilted her head...

"Mm. I just examined my crystal ball. To learn twenty-six lessons in such a short time yesterday—at that rate of learning, he could become Maou-class within a few years."

Ajuka looked directly at Su Yang.

In truth, the time he predicted would be even shorter. As long as Su Yang agreed to his arrangements, Su Yang could reach Maou-class within a few months...

A few years? It was even possible for him to become a Transcendent!

However, he did not say that aloud.

"Maou-class within a few years?!"

Sona and Rias both sucked in a breath!

Devils perceived time differently from ordinary people. A few years to them was no more than ten-odd days.

"Well, I'm not too sure either."

Su Yang's gaze drifted slightly.