After Serafall said this, Takumi's expression became clearer.
Sona thought Takumi was reacting to her sister's antics and tightened her grip on her. In reality, Takumi had just triggered a new sign-in notification.
[Ding!]
[Congratulations to the host for triggering a Plot Sign-in! Sign-in Level: Diamond!]
[Sign-in Plot: The Magical Girl's Cosplay Game!]
[Magical Girl's Cosplay Game: The Maou Serafall, who has always claimed to be a magical girl, longs in her heart for someone to play games with her. Become the "Demon King" who defeats the Magical Girl in the game and complete the "Maou vs. Magical Girl" scenario...]
[Sign-in time limit: 180 days.]
A sign-in from Serafall seems to require a certain amount of strength to complete, Takumi thought. A "Maou vs. Magical Girl" plot? Does it mean defeat and then imprisonment? Or defeat, imprisonment, plus something else?
On the other hand, the interaction between Sona and Serafall was chaotic. Sona could clearly smell Serafall's fragrance; considering Takumi was watching, she hurriedly pushed her sister away.
"Cough, cough... My relationship with my sister isn't like that, Takumi-kun, don't get me wrong," Sona said, her face flushing.
As the dignified Student Council President, she was a little embarrassed to have Serafall acting so clingy in front of Takumi.
"Anyway... This is for you, Takumi-kun. Also, I am actually a devil. You should know this now."
"Well, I just found out."
Takumi looked at the transparent crystal ball with interest. He believed this was definitely not something Sona or even Serafall could have created on their own. He could easily see through High-class Devil-level magic, and he could understand nearly half of Maou-level magic, but this object was completely opaque to his senses.
"That's good. I'll tell you the specifics tomorrow. You must be tired today, so my sister and I won't bother you further."
"You only need to know that devils are not inherently evil," Sona said very seriously.
Since Takumi wasn't revealing his true incarnations, Sona could only perceive his spiritual power at the level of a Low-class Devil, and it appeared basically empty now.
"Don't worry, President, I know that. Otherwise, wouldn't you have eaten me long ago?" Takumi said with a smile. "Also, I will study this carefully. A lot of knowledge emerged in my mind today, and I need time to digest it."
Takumi nodded again; he was truly interested in what was inside this crystal ball.
"Well then, see you tomorrow, Takumi-kun."
Sona bowed slightly, then grabbed Serafall's face. A teleportation circle appeared under her feet.
"Whoosh!"
As if escaping, Sona vanished from Takumi's side, dragging a reluctant Serafall with her. Shame—it was truly shameful!
........
"Uh... ok."
In the blink of an eye, he was left alone. Takumi couldn't help but chuckle. But this was the perfect time to study the crystal ball. Using the power of Vamana, Takumi returned inside his home.
"My upper limit of spiritual power and physical strength still needs strengthening," Takumi noted, frowning. If his physical strength were at the level of a High-class Devil, he could easily subdue Kuroka and Bikou, and even fighting Serafall wouldn't be difficult.
Humans use spiritual power, devils use demonic power, angels use holy power, and onmyoji use magic power. If he became a devil using a Mutation Piece like the Queen, he could obtain the power of at least a Middle-class Devil instantly. With his talent, he could probably become a High-class Devil the next day.
But... he still valued his human identity. And the fact was, his potential was too great. Although his strength was growing rapidly, it was difficult to forcefully elevate him in an instant. After obtaining the Ten Incarnations of Vishnu, his body was strengthening constantly; it would reach the level of a High-class Devil in three or four months. If others knew he found this growth rate "slow," they would likely want to hit him with a hammer. Growing from Low-class to High-class in a few months would make even the descendants of gods feel ashamed.
On the other hand, there was the need for physical stamina. With his current limits, he could only use two incarnations simultaneously. If he could use three, he could have done much more against Kuroka. Currently, using Krishna with the Alpha Stigma to destroy magic and Vamana to enhance mobility while maintaining an undefeated stance was his limit.
If a typical Longinus user knew what Takumi was thinking, they would probably collapse. Most users can only hope to kill High-class Devils by risking their lives, and only those with top-tier talent like Vali could dream of more.
"But... what is this thing?"
Takumi found a red button under the crystal ball. Since it was given to him by Sona, he was confident it wouldn't harm him.
"Beep!"
When he pressed it, a man's hologram appeared.
"Maou... Ajuka..." Takumi recognized the figure immediately. The hologram of Ajuka Beelzebub began to speak.
"Hello, lucky young man. I am Ajuka. At the request of the next head of the Sitri family, I will be your teacher for a time."
Ajuka spoke kindly. Takumi narrowed his eyes slightly. Sona? She asked Ajuka for this? At what cost?
"I will teach you vast knowledge regarding magic, which is considered top-tier in this world. However, this knowledge belongs to the devil side. Do not spread it, or I will personally clear the portal."
Takumi listened silently. The restrictions on the outside were powerful, but the magic within was structured logically; he could see at a glance how it was used. It was essentially an offline instructional video. A Maou like Ajuka didn't have the time to teach someone in person.
"First, let's start with this."
After the introduction, the teaching officially began.
"The simplest way to construct a magic circle..."
In Ajuka's hand, a small magic circle appeared.
"Ah... I already know this." Takumi pressed a button that looked like a fast-forward to the next section.
"Second lesson: the flow and circulation method of magic power..."
"Yes, yes... next lesson..."
With the Alpha Stigma, the Krishna incarnation, and his powerful computing ability, Takumi's learning speed was unparalleled.
"Lesson 25: the possibility of constructing a magic circle using external spiritual energy..."
"Huh? A research topic? This is interesting..." Takumi showed a bit of curiosity. "Ah, I've got it."
A few minutes later, Takumi pressed for the next lesson. For him, learning new knowledge was intoxicating. He had already mastered school subjects and human-world knowledge. Learning this also allowed him to strengthen himself. Just as he was becoming completely absorbed in his studies...
"Ding-dong! Ding-dong!"
In the middle of the night, the doorbell rang.
"Sigh, I didn't expect it to be this person."
Stretching his muscles, Takumi yawned and walked to the door. He really had to open it, otherwise his house might be turned into an igloo tonight.
"Click."
As soon as he opened the door, Takumi saw a pair of snow-white thighs and a pair of pink eyes brimming with tears. If someone didn't know this girl, they would be fooled by her weak and deceptive appearance, perhaps even letting her in with some unhealthy thoughts. In that case, they would likely end up as an ice sculpture.
"Serafall? ... Well, why are you coming here at this hour?"
Takumi sighed.