SONE-710 The Big-Breasted Big Sis Who Usually Looks Down on Me and Acts All High and Mighty Gets a Complete Reversal of Power! Every Day, 30 Minutes of Absolute Submission Where I Can Grope and Play with Her J-Cup Massive Tits Renka Itsuki

The story follows an ordinary younger brother who has always been looked down upon by his busty older sister with J-cup massive breasts. She is arrogant and disrespectful. However, a dramatic reversal of power dynamics changes everything. From then on, there is a fixed 30-minute period of absolute obedience each day, during which the sister must completely submit to her brother, allowing him to touch and play with her J-cup breasts at will. The brother revels in this reversed pleasure, while the sister gradually succumbs from initial resistance. Their relationship undergoes profound changes through this unique interaction, filled with taboo sibling lust and dominant ecstasy.