Sin System: Demonic Harem After Reincarnation

In the remote valley of Karsuda Province, Grimbow Kingdom - There existed a dense forest full of monsters and dangers. The surrounding villages were all fenced and protected by at least one Rank E Adventurer.

If any large monster such as the great hilly bear or a minatour appeared, they would immediately seek help from the knights stationed in Orlando or a group of Rank C Adventurers. These days, rumors were flowing that a dungeon had spawned in the valley.

Its entrance was inside a dark cave, they said. They said the dungeon looked harmless at a glance, but dangerous creatures resided in the depths of it.

Two adventurers, E and F-Rank, had gone inside to explore but even though 3 days had passed, they still hadn't returned. The villagers were afraid that the monsters inside would come out. Their strength may not be high enough to fend those monsters off. Fortunately, the guild would send a party soon to clear out this threat…

…

''So you mean you need mana crystals?'' Jake asked the dungeon fairy.

''Yes! Once the core gets 200 mid-grade or 2 high-grade mana crystals, it will be habitable for magical beasts. Monsters are attracted towards greater mana and would settle in our dungeon's floors,'' Lena explained, fluttering her light green wings.

She wore clothes that looked like grass blades woven together and even had a tiny green clip on her hair. Her appearance screamed cuteness and Jake couldn't help but pat her with his forefinger as she sat on his wrist. She bent down and touched the silvery ring he was wearing.

'That's why the demon spiders refused to go to the upper floors. The further they are from the dungeon core, the less mana there is. It looks like anywhere you go, there needs some sort of cash to do something - In this case, the mana crystals,' Jake had a thoughtful look on his face.

It had been three days since he started breeding the demon spiders. They were grey and had disgusting mouths, to be honest. At least the queen had an upper humanoid body. Jake had to learn the skill of spider tongue to speak with her.

As he had bought her from the system, she had his unique soul mark. She would have to obey his every command. However, the same wasn't the case for her children. Those demon spiders didn't have a sentient soul like their queen, so they were nothing more than animals with magical powers. They only listened to their queen whom Jake named Isa. As long as he controlled Isa, they were also under his control, indirectly.

At the moment, Yunna was overseeing the spider queen and her babies on the fifth floor.

Jake called the system and glanced at his Evil Points, thinking, 'I need more…'

Yesterday, he had committed more lustful sins with Erin and Yunna. However, the system seemed to not reward much after the first time. Either they would have to advance in their rank or Jake had to find another target.

Of course, Jake knew who that target would be. He stood up from his seat and walked through the dimly lit corridors.

This dungeon had 7 floors and had a size of approximately 12 sq. miles (31 sq. kilometers). Each floor's height was that of a modern building's two stories combined. It was pretty deep. Mostly, this dungeon was rocky, dark with almost no vegetation. The air inside came from the various tiny holes which reached the surface.

The dungeon core was in the middle of the 11 chambers on the 7th floor. It was a solid and floating red ball that was connected with the mana of the dungeon. Lena was born out of this core and had a very special relationship with it.

Jake's personal chamber was also on the 7th floor and he had modified a few things inside, making it more suited to his needs. He added more torches and a large high back chair, also creating more space in the middle. There were a few traps in the corridor that led to his room, but Jake wasn't satisfied with the overall security and maintanence of this dungeon.

As he turned left and walked some more, he reached the abandoned chambers. It was previously Erin's room but he had permitted his two servants to stay in his chamber. Well, why not?

He planned to make his chambers even bigger. Lena had said that he would be able to expand the dungeon after upgrading the dungeon core. It might cost thousands of mana crystals. However, Jake wasn't deterred by it. After reincarnating, he had greater ambitions!

The sound of his black shoes clicking against the floor resounded in the chamber as he entered it.

''How is she doing?'' Jake asked and saw the priestess chained against a wall with blood-red chains. Erin was standing there, keeping watch on her.

''Y-you demon! Don't come nea-'' Perry screamed the moment she uttered those disobedient words.

''Aaaaaaaah!''

''Alright,'' Jake said and Erin's left hand's fingers stopped glowing. He came beside the vampiress and casually started fondling one of her breasts.

[Ding! You have committed a lustful sin. You gain 9 Evil Points!]

As expected, the rewards were low.

''Mmm… m-master-''

''Tell me about her,'' Jake didn't stop.

''Yes, she still hasn't given up. Even though she has been infected by my blood essence, her faith is firm and she refuses to fully turn into my blood servant,'' Erin reported, leaning on Jake's chest.

She then looked at Perry and her fangs grew. The next moment, however, she received a spank on her butt which jiggled violently.

''Annh~''

''Enough, you have sucked a lot of blood from her already.'' Jake sternly said. His tone then softened as he patted her head and walked toward the priestess.

''Remove the chains.''

At his command, Erin stopped using her ability and the red chain dissolved into the blood which formed thin streams and merged with Erin's dark red one-piece.

Perry's lithe body suddenly fell toward the ground but Jake caught her with one hand. This priestess had red marks all over her body and her clothes were tattered badly. She could very well be considered naked.

Jake easily placed her on his shoulder, ignoring her curses and the futile attempts to hit him. He turned to Erin who was standing there and ordered, ''Go tell Yunna that she doesn't have to look over the spiders now.''

His voice came off as deep and husky. Any other person would have been scared shitless, but Erin knew Jake always sounded like this, and didn't have the pitiful reaction like that of the priestess.

''Yes, master~'' She bowed and immediately transformed into a small bat.

She had become a Second Circle Vampiress yesterday, thus gaining the ability to morph. Drinking the blood of a demon such as him, she was bound to advance. However, reaching the third circle wouldn't be so easy.

After she flew away, Jake threw Perry on the empty bed and looked at her struggling. A cleric who could cast divine spells… she would be a valuable asset if he could convert her beliefs and make her a Dark Priestess.

She would be able to use demonic spells specially targeted towards healing and protection! There weren't many people like this among those of evil alignment.

Jake took out a simple healing potion from his inventory and got on the bed. He had recently purchased it. Perry tried to back away only to realize that he had cornered her from all sides.

He pulled the cork from the bottle and poured the dark green liquid on her wounds. She wasn't cooperating, so he used his fear aura to make her stay still for a while.

After he had fully healed her wounds, he threw the bottle away. The sharp sound of glass crashing on the floor resounded and Perry seemed startled.

''I will never give in to the likes of you!'' She said with tears in her eyes. Even he couldn't help but admire that determination. However, the next moment, his gaze turned mischievous.

'We'll see…'

[Ding! You have equipped the title ''Lustful Demon.'' Females around you within a 10 meter radius will be aroused.]

The system's notification made him smile and Perry couldn't help but gulp seeing it. The next moment, she felt like that smile was actually rather charming. Her body felt a little hot and…