MNGS-078 - My Gal sister treats me like her personal sex toy because I'm a shut-in

After returning home from college, Moka finds out her younger brother Kazuma has become a shut-in. Unable to see him suffer, she decides to become his personal plaything, letting him use her body whenever he wants to satisfy his pent-up desires. As she showers him with affection and indulges his every whim, their relationship takes a dark and twisted turn.