This is my first futanari caption, and as such, the first caption I’ve had to post elsewhere to get around DeviantArt’s puritanism.


 All persons depicted are fictitious, not owned by me (The character depicted is an original character by Mikage Sekizai on Pixiv), and above the age of 18.  I make no money through this image.
TRANSCRIPT:
It was finally time.  All the students had left the school, and all the teachers were either gone or in the staff room a floor below her, grading tests or whatever.
She had kept herself pent up for hours now, but sweet release was finally at hand.  It was her day to stay after school for clean-up duty.  She dropped her skirt and panties, revealing her throbbing erection.  She headed over to the window, closed the blinds, and leaned back against the glass while she began thrusting with the aggressive desperation of a beast in heat.  Given the sheer force at which she went at herself, it was an accurate metaphor.
At a certain point, her powers kicked in, infusing her whole body with cosmic energy.  Her masturbation felt even better.  Every thrust felt like dozens of orgasms at once.
But when her proper ejaculatory climax finally arrived, it was simply transcendental.
Semen streamed out her cock with the force of a fire hose as more endorphins than a normal human body was capable of producing, let alone carrying, flooded her brain with euphoria beyond comprehension.  Her mouth was wide open, but no sound came out.  Her brain was working solely on processing the endless waves of pleasure from her supernatural hypergasm.  If she weren’t already leaning back against the window, she would’ve likely fallen over and wound up bruised.  While she was already powerful enough to avoid any sort of harm as a result, she opted to avoid it to minimize the hassle.
When her rush of cosmic ecstasy finally ended, she wasn’t disappointed.  She knew the next time would feel even better.  This round gave her the power to make it so.
Each time she masturbated, she became more powerful… closer to something… more.
Godhood?  Omnipotence?  Becoming one with the entire universe?  All three?  Something beyond even that?  She had only speculation to work with.
Whatever the future held, it felt so good that she just had to keep at it.  She was curious about what this was all about, too.  With no one to ask about it, her only course of action was to keep doing what her instincts told her to.  A quick wave of her hand instantly cleaned up the substantial mess she made, as well as the rest of the room to an acceptable state for tomorrow.  She retrieved her underwear and skirt, put them back on, and headed out the door with her personal effects in hand and a smile on her face.