Strongest Mage with the Lust system

"Arrghh! You bastard!" The demoness was thoroughly enraged. Her demon energy started thrumming inside her body and was about to charge out. But,

Shing~

All of a sudden, it was suppressed. The demoness was helpless. If she could be free, she could kill him with every breath, but now she couldn't even move and could only be humiliated.

"You have quite the temper, don't you?" Max grinned. He then raised his right hand slowly and deliberately. He then stretched it backward and,

Slap!

He once again slapped her.

"How was it? Was it any help in controlling your temper?" Max asked, turning his ear toward her as if he really wanted to know her answer. But the next instant, he broke out in laughter, "Hahaha. My bad! I forgot you can't understand what I'm saying."

Puah!

The demoness was so angry that she spat out another mouthful of blood and her pretty face was completely red and swollen.

She knew becoming angry at this petty human wasn't going to make things easier on her. So, she shouted, "Senior. You said you'll save me if I agree to become his sex slave. Can you stop him now?"

[Little doll. Don't worry. I'll certainly save your life since you agreed to my offer. For now, let him vent his anger.] The system's voice sounded in her head.

Hearing this, she felt even more helpless. First, she had to destroy her pride and agree to be his sex slave to save her life. Now, her remaining dignity was also going to be destroyed by this bastard.

She let out a rueful sigh and closed her eyes.

Slap!

Max slapped her before asking, "Who said you could close your eyes, huh?"

To his surprise, the demoness didn't open her eyes, nor did she shout in anger upon being slapped again.

[Hehe, she seems to have accepted her fate. What are you going to do now? Are you going to kill her?] The system's amused voice sounded in his head.

"Kill her? How would that benefit me?" Max cackled maniacally. It seemed his anger had affected his rationality.

However, the system wasn't bothered by this. It asked curiously, [So, what are you going to do?]

"I remember you told me there is a spell in the system shop that can forcefully extract a woman's yin energy, right?"

Hearing this, the system almost cheered loudly and said, [Yes. There is. I can even give it to you for free.]

"How long do I need to train in it for it to work?" Max asked.

[If you were to train in it, you'll take a few weeks to months to achieve initial mastery. But with my help, you can use it right this instant.] The system offered.

"That's good then. Give me the spell and help me use it on this demon. I'll extract all of her yin energy before killing her." Max said, his eyes glinting.

[Kid, are you sure you want to do it? I remember you told me not to mention it ever again the last time I suggested?] The system asked.

"I just didn't want to use it on humans. As for her, she is a demon who almost killed me and I'm sure if she wasn't restrained by you, she would've tortured me to death. So why would I not want to use her to become stronger? From the recent happenings, I realise I'm too weak even with the help of grade three talismans. If I don't become stronger sooner, I don't think I'll survive here." Max said. Although his anger contributed to him making this decision, he was still sane and knew if he didn't take some drastic measures, he would be forever buried in this demon land.

[It's good that you can see the reality.] The system said in approval and then added, [Alright. I'm going to transfer the spell.]

Whoosh!

As soon as it spoke, a spell named 'Pure Yin extraction and assimilation skill' appeared in his mind.

It took more than half an hour for Max to read it completely. It was a very complex spell to execute as the user had to be conscious of each step while having sex or it'll fail.

'It's no wonder the system said it will take me weeks to months to achieve initial mastery of it.' He thought.

"Hey, old man. Can you find a safe and secluded place for me to start?"

[Sure. You take her and continue moving in south east. You'll soon reach a deserted valley. It's a safe place devoid of all life.] The system immediately replied.

"Alright." Max nodded before throwing the demoness over his shoulder. As he held her supple thighs, he felt good and couldn't help but give them a firm squeeze.

The demoness flinched but didn't say anything. After feeling her thighs, he ran in the southeast direction.

"Where are you taking me?" The demoness asked.

Max didn't understand what she was asking, so he just ignored her.

[He is taking you to a safe place where you need to perform sexual activities with him. Don't worry, little lady. You just have to do your best to satisfy him and I'll make sure he doesn't kill you afterwards.] System's voice sounded in her ears.

The demoness didn't answer and just sighed in regret. 'Maybe I shouldn't have come to check the disturbance. If I hadn't, nothing like this would've happened.'

...

After two hours, Max arrived at the deserted valley the system had mentioned. It was really deserted. The ground here was black, and there was no sign of any vegetation.

"Hey, have you gone mad? Why did you come to this accursed place?" The demoness on his shoulder shouted out when she noticed where they had arrived.

Slap!

Max slapped her round and plump buttocks and shouted, "Keep quiet!"

The demoness knew Max couldn't understand her, so she shouted to the system, "Senior. Quickly tell him not to enter the valley. This valley is very dangerous and anyone below king rank who enters it would slowly lose their life force."

[You don't have to worry about this. You'll be safe with me here.] The system nonchalantly replied.

"This... senior. You... are above king rank?" The demoness asked in disbelief. What was a demon above king rank doing with a human weakling?

The system didn't answer. Max, who was clueless that the demoness and the system were talking, entered the valley.

Whoosh!

As soon as he stepped on the black soil, he felt himself getting weaker by a bit, but this feeling lasted only for a brief moment before everything became normal.

The demoness was surprised when she didn't feel her life force vanishing and confirmed that this invisible senior was at least an emperor rank demon. Her father, who was an elder of the blood wing tribe, was just a peak king rank demon.

'Wouldn't my life would change if I can become his disciple?' She thought.

Although she belonged to a powerful tribe and family, because she was a female, she didn't have as many opportunities as her male siblings. She didn't even have a king rank demon as her master.

That's why when she realized this senior could be an emperor rank demon or above, the thought of becoming his disciple appeared in her mind.

'Maybe If I can satisfy this human enough and make him addicted to my body, I can stay with him and learn from this senior.' She thought. 'Yeah. That would do. These humans always fantasize about having sex with us beautiful demons. He surely would love me after doing it with me. Especially since I'm still a virgin.'