If you have enough, you should give some back.

From the moment the arm tore through the geisha's spiritual body, Leonardo started spreading mana threads in a methodical manner. Her eyes were wide and red with rage. She had stalked him through some time and figured what he was trying to do.

[Do you really think you're that much of a genius to use a mana method that's still only a barely finished theory to tame a high spirit!? You think I'll let you!? I'd rather die!]

Leonardo answered with a burning, sneering gaze. In the middle of their staredown, he pulled everything that was inside of him and exhausted all mana a normal human can gather, there was no going back, he would either succeed or they'd both die, even if he succeeded, there would be no certainties.

Blood streamed down his mouth as the vicious grin showed itself, daring her to go until the very end. He saw her cold voice break into a twisted, frenzied rage. Disheveled hair and spit with screams reached him. She screamed like a shrew, but when the time came to finish it all, she closed her eyes.

[Shit.] And let him through.

****

There was a bright light, then came a long dream.

Like a fast-forwarded movie, he saw a ten-year-old girl being sold into a brothel. He felt what she did and thought what she thought. He developed her keen eyes of observation, as she grew and learned how to read body language, moods, and even a person's feelings and intentions towards her. He learned how to act and survive together with her. She took twenty whole years before mastering those abilities and taking over the brothel and making it the strongest organization in her area. The geisha then died of old age and became a spirit of lust. Giving supernatural strength to her mastered ability.

Normal light then reached his eyes as the dream was over. Leonardo turned a gaze at the window of the hospital room. A small butterfly silently stayed on the windowsill.

"...You're an incredible person." He said.

[...]

"You don't need to be too aggrieved, I couldn't totally take over you, I merely inverted the contract's terms, you'll be my slave in this world, but in exchange, I'll realize everything you wanted but couldn't. Azumi, there's no need t-'" A surge of cold extended from the butterfly

[Do not casually say my name.]

Leonardo looked at himself. The cold that spread from her was real, the glass on the windows had some shallow ice in it, but he clearly didn't feel it.

[Don't be so full of yourself, I've been alive for long and can see full well the reason of your plights, you don't meet eyes with your mother and sister because you're a pervert. You're afraid of being inspired by their figure and draw them on to the erotic series you've been selling online. Like you did with other women from school. You're an intelligent degenerate of lust that makes erotism into art, that's why I wanted you as my slave.]

"...My authority, is resistance to ice?" Leonard ignored her and asked.

The sound of smacking lips came from the butterfly. It isn't strange he's immune to her finger-pointing, he lived her life through the dream, learned her ability of observation and, basically become shameless. Should they have made a contract she would impart only part of her ability, but he enslaved her and took everything.

She didn't have much knowledge besides dealing with people, but Leonard is absurdly knowledgeable and the only thing holding him back was his timidness and completely lacking social skills... if he was a tiger with no claws and fangs before, now he became one with all that, plus wings.

She observed him for a second, nothing but calm curiosity was on his face, she stalked him for a week and knew that to some extent he was...different, but he didn't let it out, but now, after his worst day... that cord snapped...

Azumi lamented her lost freedom but felt that it's better for herself if they have a good relationship.

The butterfly fluttered her wings and landed on the sickbed.

[Your authority is the same as mine, but since you're a man, a creature of yang, on more comprehensible words, testosterone, your attribute changes. Mine is cold because I'm yin, estrogen. But the nature of the ability is the same.]

He looked down at her. "And that nature is?"

"...It's a passive authority, as you feel pleasures of any kind, the quality of your mana will improve varying on the intensity of said pleasure. And with high-quality mana, everything else is improved.]

"So, I won't have any otherwordly ability, I"ll just be able to improve and evolve like a normal mage without authority, except, I'll grow rapidly and theoretically without a limit cap?... But didn't you died of old age?"

She thought he'd be angry. Not having an obvious authority is normally a wall for the humans, but he was smiling instead, a grin that induced a chill on her spiritual spine.

[...My ability only gained its supernatural strength and become an authority after my death. Remember; the only thing that can hold you back or push you beyond what 's known; it's pleasure. But don't ever take it for granted, it gets increasingly hard to find it as you get used to it.]

Leonard took his time thinking, then looked at her and smiled "Thank you."

Azumi didn't know what exactly he thankful for, her giving up? the powers he gained through her? Her willingness for good cooperation? For waking him to the law of the jungle? There was no way for her to know so she changed the subject.

[..Because you tried to run over the madmen with your car and unwittingly gave others time to scape, you became a "hero". Your father is using your recent popularity to spread his name, he already spoke in two major radio stations and was invited for an interview on the local tv channel.]

Leonardo nodded, a malicious glint shone through his pensive eyes.

Suddenly the noise from the hallway grew loud and two pairs of eyes locked on him.

The butterfly flew and landed behind him. [Your mother and sister were here the whole time, they just came back after buying lunch.]

"Leo!" His mother jumped on him. "Why did you tried to run over an authority holder!? You're so intelligent, you know you couldn't possibly win, even if he was the weakest kind!" She yelled while squeezing him tightly.

"I did win though." He said and earned a very light slap on the arm. Leonardo reached out and ran his fingers through his mother's hair and kissed it lightly as she was crying and thanking god. He looked at Hailey and motioned for her to come closer. She pretended to be aloof but as soon as he acted a pained expression because of his overextended arm she came with crossed arms and let him hug them both.

They hadn't noticed how casual and intimate was his actions.

He held them both, and as a warm glint mixed with something else flashed by his eyes, he spoke; "Mother and Hailey are both mine... I couldn't just leave and not protect you two."

Azumi fluttered her wings feeling another chill on her spine.

"Besides... someone told me I couldn't die, so I didn't." He met eyes with Hailey as he spoke, the girl's whole face became a red tomato and looked away.

He turned to the outside of the window with something completely twisted deep inside his eyes and grinned. "Also...I received so much on my life, and even more, on the last day of school, it's time I give something back."