Twilight smiled at Dash, making it as innocent as she could possibly muster given the circumstances. She quickly turned away, searching the shelf behind her. It was more of an act of desperation to avoid looking at the collar. But it was to no avail as the mere idea of her knowing it existed made her shiver. And the concept of her knowing it was around Dash’s neck but that she had to fake ignorance to the fact that the thing existed made her head hurt. She was both in pain and incredible arousal.

“Sure Dash, just let me look in my room first…”

“No need! I already sorted all the books from your room into these shelves!” Spike said proudly.

“I love you Spike.” Bass smiled mischievously

“Allow me Twi! Just tell me where could the book be?” Dash said, urging Twilight.

“Maybe here over my head.”

“Maybe here over my head!” Twi said joyfully, but her joy quickly faded as she realized Bass just landed a major hit on her composure.

And the plan worked perfectly for Bass as Dash indeed placed her cyan plot just above the purple librarian. The folds of her dearest treasure was there, just a breath away from Twilight. The smell made Twilight drool, as her mind was invaded by one perverted idea after then next. A faint magical glow enveloped Twilight’s horn, and Dash’s vagina began to open, making the Pegasus let out a small moan accompanied by a heavy breath. The noise snapped Twilight out of her trance, and the magic disappeared.

Dash on the other hoof fought to keep a straight face. The feeling of somepony playing her like a flute was coming to mind. Was this Bass’s doing? Her determination managed to overcome the Toy persona temporarily.

“Wow, you really keep it hot in the library Twilight! I am sweating all over, could you open a window or something?” Dash asked.

“Yes, now that you mention it. Spike could you please open the window in my room?” Twilight agreed with a big cheesy grin.

As the little dragon helper went to open the window Twilight and Dash just kept smiling and sweating. Both had the same idea in their mind: “I am so screwed.”

“Why don’t you look under V for Voodoo and I’ll check under A for Affliction?” Twilight suggested.

“Yeah, sure!” Dash replied, desperate to hide her arousal.

And soon enough, she and Twilight were as far as they could be from each other inside the main library hall. Twilight began to scan the book names, but her peace was shortlived as Bass began to clap her hooves inside her head.

“Well played, Twi. But you know I am winning this game of ours.”

“Over my dead body!” Twi replied in her mind.

“Nah, I don’t like blackmail that much. I would prefer if you gave me control willingly. If I recall, I didn’t choose that plot. It was you. Now, what sexual fantasy shall I use today?”

A surreal feeling came to the purple mare, as her dirty thoughts were categorically scanned, and she relived each and every one for a second.

“Bingo.”

“You monster.”

“Please Twi, you are hurting my feelings. This is your idea, remember? I am just bold enough to go for it, and Toy is just waiting for Dash’s guard to drop.”

As a familiar glow began to envelope the mare’s horn, Spike came back down the stairs.

“Spike! Please go and get Vinyl, I must talk to her!” Twi pleaded. Spike nodded, leaving the two mares alone inside the library.

The magic was now enveloping Rainbow Dash’s plot, and soon enough a dildo materialized inside her womb. A mixture of pain and pleasure erupted inside the Pegasus, and her moan was now too much to hide. The sound of it made Twilight shiver as the darkness began to take its toll.

“Oh yeah, look at her face. She wants it. She needs it. And we are her savior.”

The dildo began to hum, vibrating the walls of Dash’s inner sanctum, sending thoughts of obedience surging into her mind. Toy was breaking free, and Dash could only cry and feel shame.

“Didn’t that feel good? Now again!”

Another twitch and a new jolt of life went into the dildo. Dash’s resistance was crumbling, and Twilight was the culprit. An all too familiar heat began to churn inside the unicorn.

“There is that twinkle in your eye again. Be honest, you are a bad mare. This whole Twilight Sparkle thing is just a façade. You were never good, you just acted like that out of fear. But I will take away the fear and replace it with pleasure. Now again!”

Just as foretold, a new buzz came from within Dash and a moan followed suite. The wooden floor underneath the cyan mare was soaked in her vaginal juices and a few tears as well. Dash’s spirit sank as deep inside she knew that the battle was done, and she was not the victor. The constant arousal and denial began to roll into one single idea of surrendering to the magic of Bass Cannon and the deprived being that resided inside her. She took one final deep breath and vanished into the dark depts of her mind. The collar began to flash and in a beam of light the writing changed from “Toy” to “Dash”.

“Please Mistress, let Toy come. I promise I’ll be a good slave from now on!” Toy pleaded as she took complete control over Dash’s body.

“Isn’t that sweet, our toy is back! Feel the power you have over her, let it fill you! No more need for holding back! “

The glassy look and the yearning expression was intoxicating to the purple mare, and her walls began to crumble under the sheer wave of lust and evil energy. A familiar tingle in her hooves began to resurface as the white fur began to signal the return of Mistress Bass. She tried to pull away desperately, but her legs gained a life of their own, placing the unicorn's soaking plot right above the muzzle of Toy, so close that she could feel the breeze of air as the cyan pegasus breathed in, and quickly out.

Twilight closed her eyes, desperate to at least postpone her descent into dark vortex the curse forced her into, but her task became virtually impossible, as Toy’s tounge began to caress the lips of her vagina. Her mind rode the sensation as the idea of embracing the dark version of herself went from complete denial to a probable solution.

“It’s wonderful, isn’t it? All those nights, you imagined her being under the blanket, pleasuring you, as you slided you hoof up and down our little treasure, limiting the damage. But now this is no fantasy, this is the real deal. And all it took is for you to just swallow that stupid moral, your code, and your outdated ideals.”

Bass’s voice was piercing Twilight’s defenses quicker than the Element of Magic could regain her composure, as the devoted Toy licked and placed the tip of her tongue making her way to the clitoris.

“Kindness, goodness… rubbish! You don’t need that anymore! It’s time to stop imagining being the bad mare for once, and start living it!”

The fur on the unicorn was white, but for head and horn. The eyes were flickering in a magenta tone, ever so slightly. Then, a scream erupted from the mare’s mouth as Toy reached her destination, and when she licked the clit there was no stopping the devoted mare.

“Yes! Stop thinking and just feel it! Feel the sweet embrace of darkness!”

“…Darkness…” Twilight whispered as the white fur engulfed her head, and Bass went in for the kill.

“Twilight is just a mask!”

“…Twilight…just…mask…”

“Twilight doesn’t exist.”

“Twilight…doesn’t exist.”

“Yes! Yes! Almost there!”

The purple was now only on the horn as the line between Twilight and Bass was getting thinner and thinner. One more lick, one more push and Twilight would come, and vanish into the darkness forever.

“Say it! I am Bass Canon!”

“I….”

“…am….”

“…Bass…”

Two figures crashed through the door with sonic speed, one grabbing Dash/Toy while the other splashed the surrendering mare with ice cold water, shocking the unicorn just enough for Twilight to snap out of the arousal and regain some form of control.

“Sweet Luna, that was close!” Rarity commented as she held Twilight.

“It’s a good thing Spike jogs. One minute too late and we would have to deal with Bass Canon, and Luna.”

“Not to mention the fact we would lose Twilight completely.”

A moment of silence overcame the library as shallow breaths from the cyan Pegasus and the purple unicorn pierced it.

“Well, I merged and am still me, I guess.” Vinyl remarked after a tense few looks between her and Rarity.

“Yes, you numbskull. This was not a merge, this was a complete conversion. Don’t you remember the lecture from Luna at all?” Rarity snapped back.

“Sorry, I kinda forgot. Can you explain it again?” Vinyl admitted.

“You are unbelievable. Fine, but pay attention this time! A merge is the true mix of the both personalities, such as you and me. A complete conversion is the total subduing of the original personality until only the dark, cursed side remains. You know, the thing we are trying to bucking avoid at all cost!”

“Oh right, that’s what you call it. I always thought it more of a “remixing” and “cover”.” Vinyl remembered, her face reddening from embarrassment.

“Anyway, you take care of Dash while I call Luna. This whole thing is getting over our heads.”

“Sure thing!”

Vinyl levitated the spent pegasus, and placed her into the back of a carriage that belonged to Twilight that had been placed just in front of the library. Rarity, brought the unicorn to her bed and began to clean the floor of the liquids of Dash and Twilight.

Just after she finished cleaning up Spike entered the main hall, his eyes fixed on the door, broken cleanly of its hinges.

“Not fixing that!” the dragon exclaimed instinctively.

He looked around the main hall and to his amazement, besides for the door the room was cleaner than ever. The purple dragon ran into her best friends room, only to find her her bed and his crush sitting next to her.

“What happened Twilight? Are you okay?” Spike inquired.

“I am alright now, thanks to Rarity and Vinyl.”

“What is going on? You've been sick ever since we came back from the parade. I played the fool in hopes you would come clean and tell me happened to you, but just keep avoiding me like I am some stranger.”

“I really wish I could tell you…”

“Then tell me Twilight!”

“I can’t, I just can’t! You have to believe me here Spike!”

“How can I if you don’t trust me enough that you can tell me!”

“I just can’t.”

Spike stormed off, with tears in his eyes.

“Will he forgive me?” Twilight asked Rarity.

“Please, Twilight. It’s Spike we are talking about. Just give him some time. The important thing is for you now is to rest, and regain your composure.”

“And Dash? She became Toy again!”

“The only thing we can do is hope she has not become a full thrall of Bass. Now rest, please.”

Rarity left the room, closing the door after her as Twilight reluctantly closed her eyes, hoping she would not see Bass after she did.

…

Once again, Twilight was in her bed, with Luna by her side. The alicorn was smiling softly, as Twilight finally managed to speak.

“I need help princess. I can’t do this on my own. Please!” Twilight pleaded

“I see that now. Usually, I wait for someone to recuperate completely, but after today, I think we are out of time. Are you ready?”

“As much as I could ever be.”

A flash of light appeared from the horn of The Moon Princess and engulfed the two mares.

Author's Note

Hello again, my friends! Well, looks like Twi and Dash just happened to meet at the wrong time, and almost paid the price. Good thing Spike is in such good shape! Next, we delve into the mind of the purple mare, as Luna trains Twilight about mental discipline, and beating Bass in her own game.