Imouto Bitch ni Shiboraretai

At a joint celebration convened by a dear friend, you're introduced to a genuine sister named Mina. The two opt to partake in the festivities, surreptitiously concealing their siblings from view. However, as the night progresses, so too does the intensity of the revelry - and with it, an insatiable appetite for punishment games. 'Come, show me your breasts,' 'Reveal your panties!' 'Display that Pocky game for Ona! Mina, who endured a degrading act at her brother's hands, finds herself unwillingly drawn to her sibling's lascivious advances... Could it be that she harbors hidden desires?