[Kiba Satoshi] The Little Sister Within My Little Sister [Decensored]

Ikumi's quiet little-sister routine shatters after the discovery of the frequency for Lambda Birth 0037, leaving her brother to wake up to a different girl inside her body every night — sweeter one moment, bold and teasing the next. Her soft big breasts spilling from lacy lingerie and stockings hugging her thighs become his nightly torment as the bolder Ikumi grinds, kisses, and begs him to spill every filthy desire he has held back, insisting he pushed them in this direction. As the nightly personality switches continue, their forbidden sibling bond slips into breathless, trembling nights of relentless passion and creampie surrender where neither knows who will awaken next.