[INS-mode (Amanagi Seiji)] My and my Sister's Week of Endurance [Lolitist]

A brother and his petite twintailed sister make a dangerous game of a week-long endurance challenge, where every teasing touch in her schoolgirl uniform and thigh-high stockings threatens to break their restraint. His careful training quickly turns her small, sensitive body pliant and eager, her tight pussy molded to his shape and begging for creampie despite her breathless protests, while a petite kemonomimi catgirl with perky tail offers her own small, trembling ass for relentless anal use. Between sweet confessions for onii-chan and desperate, mewling climaxes, their forbidden bond slides from shy denial into full, dripping submission that begs to be seen through to the end.