[FSDSS-963] A girlfriend who was stolen away by my playboy older brother, turning her into an overly sensitive, quick-to-orgasm sex slave. Misono Momo

This is FSDSS-963. Seems the filename numbering was wrong.

In the movie itself, The protagonist begins dating Momo, a nerdy young woman.

She attempts to be “cuter” by wearing more makeup and sexy clothes which creates a rift with her boyfriend.

Noticing this, the protagonist’s older brother steps in the mix and tries to steal her away.