When it comes to Yu Tano, it's all about her breasts.
And her extreme sensitivity and insane orgasms.
This project is about groping Yu-chan's breasts non-stop for 6 hours while making her cum to the absolute limit to see what happens.

From the moment she enters the studio until sunset.
No breaks, non-stop.
Relentlessly rubbing, kneading, stroking, squeezing, and sucking her L-cup breasts.

Even in regular AV shoots she cums so hard.
What will happen when her most sensitive zone — her breasts — receives such focused, long-duration stimulation during sex…?
It might be closer to an experiment than sex.
Until she completely breaks.