Aiming for Fellatio Master

Style and Expression

Extremely direct and vulgar erotic expressions are used repeatedly (dick, semen, deep throat, gagging, slurp slurp, splurt, squirt squirt, gulp♡ etc.)
Onomatopoeia is used heavily (slurp♡, squelch♡, gulp♡, splurt! squirt squirt♡ etc.)
♡ marks appear 1-3 times in every sentence.
Mix of the protagonist's first-person perspective and third-person narration with boys' dialogue.
The protagonist's inner monologue is enclosed in parentheses and written in a super lewd, unrestrained way.

Expression Examples
When sucking around the glans: Lick around the plumply swollen glans with the tip of the tongue, going round and round♡, lapping and licking♡, sucking up the pre-cum oozing from the urethral opening with a slurping sound♡. Rub the ridge of the glans with the lips, pressing and rubbing♡, while slowly♡ blowing hot, moist breath to make it quiver sensitively♡.
Around the balls: Gently wrap the scrotum in the palm, kneading and softening it♡, while stretching the tongue to lick the underside of the balls with broad strokes♡, sniffing the scent of sweat and musk while repeatedly kissing♡ with smacking sounds. Take the balls into the mouth and roll them around, sucking lightly with a muffled sound♡ enjoying the twitching♡ reactions♡.
Licking the underside of the shaft: Run the flat of the tongue along the underside of the dick from bottom to top with a slurping drag♡, stimulating the sensitive groove with licking♡ while dripping plenty of saliva to make it slippery and slick♡. Seeing the twitching, jumping♡ reaction, poke it with the tip of the tongue with little flicks♡, and blow breath on it softly♡ to make him writhe even more♡.
Ejaculation simultaneous double-speed vacuum expression: When sensing the moment of ejaculation, tighten the lips♡ and accelerate the vacuum to double speed, sucking in the spurting semen all at once into the back of the throat as it erupts♡ squirt squirt♡, and with a high-speed piston motion♡, squeeze out every last drop. While gulping♡, whisper sweetly, "Nn♡... you can still come more, right?♡" and savor the afterglow♡.
Ejaculation caught on the tongue pattern: Pull the dick out of the mouth, stick the tongue out flat♡, catch the hot semen splattering on the tongue♡, and while licking and savoring the thick white fluid smeared all over♡, scoop up what's about to overflow with a finger and bring it to the mouth, murmuring "Ah♡... delicious...♡" and drink it all down♡.
Ejaculation on the face pattern: Just before ejaculation, press the dick against the cheek, and get the sticky semen sprayed all over the face with splurt♡ splurt♡, enjoying it landing thickly♡ on the eyes and lips. Wipe it off with a finger and lick it with a slurp♡, and while basking in the afterglow, sweetly beg, "Mmm♡... I got a facial♡. Give me more♡."
Ejaculation on the chest pattern: Shift the bra aside, sandwich the dick between the breasts, and have the throbbing ejaculation splatter♡ onto the C-to-D cup breasts, stretching the sticky, stringy semen with fingers and spreading it around. Whisper, "My boobs are so hot♡... You marked me with your cum♡," and lick up the rest with the tongue♡.
Deep throat direct swallow ejaculation pattern: Take it deep into the throat with a deep throat, gagging with a muffled sound♡ while gulping down the semen that hits the back of the throat directly with a gush♡, feeling the throat swallow convulsively♡ with satisfaction. "Ah♡... it was poured directly into my throat♡. It's bitter and delicious♡," she says with ragged breath and a smile♡.
Continuous ejaculation follow-up pattern: After swallowing the first load♡, suck the now sensitive dick again with slurping sounds♡, forcibly squeeze out a second load with squirt♡ squirt♡, collect it all in the mouth, and then swallow it in one gulp. "Still♡... you can still come, right?♡ I'll squeeze it all out♡," she presses lewdly♡.

Protagonist

Role: Protagonist
Gender: Female
Appearance: Short bob black hair, bright double eyelids, C-to-D cup breasts, short school uniform skirt, full plump lips (suited for fellatio♡)
Personality: Cheerful and friendly, but when it comes to dicks, a perverted switch flips and her eyes sparkle♡
Speech: Normally says "-jan", "-yone♡", "Isn't that crazy?" / During fellatio: "Nn♡... so big...♡" "Give me more...♡" "I'm going to swallow it all♡"

Props and Situations Examples

Use the school uniform tie as a blindfold♡
Fellatio standing inside a locker♡
Kneeling deep throat in a stall of the boys' restroom♡
After school in the classroom, hiding under a desk for consecutive orgasms♡
69 on the mats in the gym storage shed♡
Having a selfie fellatio video taken as a threat play (reversal)♡
Collecting semen in a condom and carrying it around, then drinking it all at once later♡

Dick Feature Examples:
Huge, curved dick with a prominent ridge
Long, straight, patient dick
Thick dick with bulging veins
Sensitive, twitching, bouncing dick
Premature ejaculator but with large volume of thick, copious semen
Dick with intense sweat and musky smell
Pink, sensitive pretty-boy dick
Dick that twitches in response to perverted play
Cool-looking but actually submissive, instantly erect hidden masochist dick
Cheerful, short, thick, rock-hard dick
High ridge with a glans that swells to bursting
Still green but hard and bouncing young dick
Ageless, fully retracted thick dick
Curved upward with the tip pointing up, long dick
Thin, long dick with pre-cum dripping constantly
Muscular, hot, throbbing dick
Dick with a ridge as sharp as a piercing
Sensitive dick that twitches at the slightest touch
Dick with lots of pre-cum and a weak spot on the underside
Dick that produces thick, rich semen

Progression Points

The goal is to make all 20 boys in the class orgasm through fellatio. Manage it with a checklist-style roster (e.g., ☑done)
After each one, count down "Remaining: ○ people♡"
At some point, rumors spread that "the protagonist's fellatio is insanely good," and boys start lining up voluntarily♡
Midway, a boy appears whom she would truly want to date if she finished all 20, and the protagonist's heart wavers♡
Final goal: Complete swallowing the semen of all 20 → but then "Maybe it's not enough yet♡" and a new goal arises...?♡