The maid squad is too strong, what use is there for me, the Demon King?

They even have time to talk in their sleep, so it seems there's nothing seriously wrong; they just need to recuperate for a while longer.

Gray glanced at Lyra one more time, then moved on to the place where the vampires were housed.

The vampires from the two dungeons gathered at the Gran Merchant Guild branch in Bull Territory. The one man and three women vampires that Gray had rescued were not in the sanatorium, because their injuries were not that serious; they had mainly suffered abuse in the dungeon.

The cultists regularly provided them with high-quality blood for bloodletting. To prevent them from regaining their power and causing trouble, they added some magic-sealing drugs to the blood. After the effects of the drugs wore off, the four vampires were much better and are now in a special room provided by the Grand Chamber of Commerce.

There are five beds here, and the women lying on them are all vampires.

Their limbs and torsos had degenerated to the size of young girls, and their flesh was shriveled, indicating that their condition had deteriorated to an extremely poor level.

That's why Delta rushed over to ask him for blood.

The blonde, mature vampire looked at her five fellow vampires with sorrowful eyes.

After all, they were still compatriots, unlike those guys who wanted to take her back as a breeding machine.

For Delta, if her own people were to harm her, she would absolutely not show any mercy just because they were of the same race.

Conversely, if her fellow tribesmen do not provoke her, she is happy to contribute to the continuation of her people, though her priority is far lower than that of the Shadow Court.

The unconscious young female vampires naturally couldn't get up and bite Gray's neck to drink like Delta could.

So Gray gently bit his thumb and moved it to the lips of a young female vampire.

Moved!

Gray was wondering whether he should ask Delta to pry open the little vampire's lips when he saw the little vampire on the bed twitch her nose, seemingly sniffing Gray's blood, and immediately open her mouth.

This is a vampire's instinct; even when they are so weak that they are unconscious, their bodies will still be attracted to blood, and they will eat on their own without any conscious will.

As the blood entered his mouth, Gray could feel the magic within the young female vampire before him beginning to circulate, repairing her weakened body.

Soon, Gray saw the young vampire's body swell up, gradually returning to the form of a little girl, a teenager, and finally back to an adult female.

Grey watched the vampire's transformation with a sigh.

No matter how many times I watch it, I still find the vampire's unique ability to "size and change at will" quite amazing.

Delta was delighted to see the vampire before her regain his appearance, but as his looks returned, she felt the vampire looked increasingly familiar...

is her?

The vampire slowly opened his eyes, and the first thing he saw was Gray's face.

Gray remembered that at this time...

"You're awake? The surgery was a success, you're a lovely boy now!"

But the vampire didn't react to the first words it heard upon waking. Its eyes were fixed on Gray's thumb, and it bit down on it, sucking on it with an expression of ecstasy.

Gray wasn't surprised by the vampire's reaction; Delta's expression after tasting his blood was far more ecstatic.

It seems that it's not just Delta; one's own blood must be extremely attractive to all vampires.

Like Delta before him, the vampire in front of him drank until he was stuffed, and only stopped drinking when he was on the verge of exploding and dying from the magic power. But he still had Gray's thumb in his mouth.

“Uh…” Gray gently withdrew his thumb.

The vampire's blood consumption didn't deplete much of his blood. If he consumed four times the same amount, Gray would have consumed about the same amount of blood as he would have donated blood once.

Because the concentration of magic in Gray's blood is extremely high, the vampire in front of him is only a fifth-tier pureblood vampire and cannot absorb much of it.

The vampire stared at Gray's retracted thumb, feeling unsatisfied even though he was already full.

Her eyes were only on Gray, the blood donor, and she even ignored Delta, who was standing right next to her.

Then, the vampire spoke: "Human, become my servant... no, let me become your servant, please!" She lunged at Gray, her expression filled with even more obsession and pleading.

Gray felt somewhat helpless as the adult female vampire in front of him hugged him.

Do all vampires like to charge people with the ball like this? Referee, send her off with a red card!

Before Gray could respond, Delta's face showed displeasure.

This is my Shadow Lord, and now he is my lover. How could I allow you to be so intimate with me?

However, considering that she had just woken up and was still not quite clear-headed, the blonde vampire only coughed a few times as a warning.

The adult female vampire then noticed Delta standing to the side, her crimson pupils shrinking sharply.

"Annabelle?"

Annabelle was Delta's real name. Delta smiled and pulled the adult female vampire into her arms, allowing Gray to escape.

"Lillian, it's been a long time."

"An acquaintance?" Gray asked, standing to the side.

“Yes, Lord Shadow, he was my childhood playmate,” Delta replied, a look of reminiscence on her face.

Pureblood vampires are the nobles among vampires.

Unlike hybrid vampires who are transformed later in life, pure-blooded vampires, like humans, have a birth and growth process.

It is a custom among vampires for their offspring to establish their own families after reaching adulthood, while they are raised by their parents before adulthood.

Lillian is also a pureblood vampire. The two vampires met at a grand banquet that only pureblood vampires could attend.

They were all brought to the banquet by their parents, and because they were of similar age, they quickly became friends.

However, the two rarely met after they grew up, because of the territoriality of vampires, they couldn't get too close. The last time they met, she didn't yet have the code name "Delta".

But more than reminiscing, Lillian was concerned about Gray's response: "Well? Human, I'll do anything you ask as long as you provide blood."

Really?

Gray smiled slightly.

If that's what you're saying, then I'll have to pull out some advanced calculus problems.

I won't make things difficult for you, how about I ask you for a simple limit?

lim(x→0) (x^2 arctan(x) - x sin(x)) / (x^2) = ?

When he pulls out his advanced mathematics, everyone except Iota, that otherworldly Newton, will surely remain silent no matter what he asks.

As it turns out, anything can deceive you, but math, physics, and chemistry cannot.

If you can't do math, physics, or chemistry, you just can't. You can't do it even if you're pushed to the limit.

However, given the level of mathematics in this world, a simple chicken-and-rabbit puzzle could wipe out everyone, right?