【This is the first time I’ve done this.】A genius scientist’s sister’s medicine turns her into a beautiful girl with an explosive root!

[story]
The main character is always being pushed around by his free-spirited genius scientist sister.
One day, her sister gives her a drug that changes her body.

Her hair grows like a woman’s, her breasts get bigger, and…
The thing between my legs has grown to an unbelievable size!

[Situations]
-TS (male to futa-nari girl)
-I got an erection in class, and the glans popped out from between my breasts.
-Milking + milking with milking machine
-When my classmates looked at me like I was a porn star in pool class.
-Health and physical education (practical skills)
-Super milking from the swollen milk pills (sister)
-Breasts continue to swell, and the thing between my legs is also getting ridiculously big.
-I have a full erection from being played with on the bus! I can’t believe it!
I’m not allowed to ejaculate and I’m not allowed to cum.

I’m not sure what to do. →A large amount of ejaculation into an oversized semen balloon belly

-Shower enema in the shower room -> Not only the stomach, but also the chest and the penis swells up to a super huge size, and the inside of the shower room becomes tight
-etc.

[specs]
-13 basic CG
-About 55 pictures including illustration differences, about 86 pictures including dialogue differences
-The version without dialogue, the version without sound effects, and the original rough drawing are also included.
-Image size of the main story, 3600*2700 pixels

[Illustration]
るぅる様(https://www.pixiv.net/users/1167660 )