https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_741279/

A certain yoga studio where beautiful women keep coming.
Under the guise of "maintaining health and refreshing the mind," lewd lessons begin with a special balance ball (sensitivity-enhancing device), completely corrupting the intelligent, noble heroines...
A super-intense, full-color work woven from the perverted guidance of the Professor and his numerous inventions (balance ball, vibrator, dildo, etc.)!

KISAKI Chapter: 145P
It begins when the beautiful lawyer KISAKI sees yoga on TV and visits a private studio!
The instructor is, of course, none other than the Professor. Though bewildered by the middle-aged instructor, the lesson begins...
But the moment she straddles the balance ball, her body becomes intensely sensitive! Her rationality collapses from abnormal reactions—love juices overflowing, her yoga wear soaked through.
Hip joint loosening → Electric massager → Dildo pounding → Cunnilingus squirting → Fellatio → Intense thrusting through positions like doggy style, sideways, train station bento, missionary, seated, and cowgirl, culminating in a massive internal finish!
Capturing the complete transformation of the intelligent, strong-willed KISAKI into a submissive female!

YUKIKO Edition: 142P
YUKIKO visits the studio for a monitor experience and light-hearted fun, only to become prey for the Doctor's long-cherished invention...
Sensitivity-doubling balance ball leads to continuous squirting, breast kneading → fingering → cunnilingus → multiple position penetration (missionary, doggy, cowgirl, sideways) and repeated creampies!
Followed by cleanup blowjob & deepthroat irrumatio, speculum vaginal inspection, and even a shower flashback scene.
The confident beauty's smile melts away beneath sweat and love juices, descending into "I can't get enough without the Professor's yoga..." across 142 pages!

BELMONT Edition: 141P
She arrives at the studio for a trial lesson of the "Pocket Tissue Campaign"...
The Doctor never touches her, perfectly staging a "yoga accident" where "she undressed herself, got wild on her own, and came begging for it."
Balance ball sensitivity boost → Self-undressing → Prototype vibrator anal development → Sex (standing, train-station style, missionary, cowgirl, doggy, anal, etc.) with consecutive creampies!
141 pages depicting the Doctor's cold-blooded victory, maintaining it as an "accident" until the very end where the strong-willed woman transforms into a complete nympho, smiling, "I wonder if I should come again..."

Series Highlights:
・Hakase's unexpected sadistic streak & technical prowess, fully utilizing his inventions
・The heroine's complete descent: "Initial confusion → Rationality collapses → Active begging"
・Multi-position piston action & creampies, squirting, overflowing depictions

https://doujin-assets.dmm.co.jp/digital/cg/d_741279/d_741279pr.jpg
This is cover

Base +18

厉害了，第一次看到这种风格的

Base +6