Let’s go, Ume-chan! Attack from a standing position!?

After classes, Ume-chan is called out of nowhere and quietly tries the cowgirl position for the first time. She throws her considerable athletic ability into it, working hard to serve him properly, awkward at first and earnest about it.

The setup is simple: a diligent girl figuring out a position she's never used, getting steadily more comfortable with it session by session. That comfort doesn't stay tame for long. Once she settles in, Ume-chan stops just following along and starts moving on her own terms, unable to keep her own desire in check anymore.

There's no wider story here beyond that one encounter escalating. The game is built around watching her go from careful and obedient to taking charge herself, with the 2D art and animation carrying the shift from restrained to unrestrained.