DSOD-076 — A gloomy, big-breasted, bespectacled older sister whispers to the man, "Are you holding back from cumming? That's so precious," shattering his self-control and leading to multiple internal ejaculations in this extreme, lustful POV video featuring Kurokawa Sumire.

Sumire, a gloomy, introverted otaku, gains a stepbrother when her mother remarries and they start living together. Sumire dotes on her first stepbrother and finds him irresistibly cute. Unable to contain her feelings for her stepbrother, the introverted otaku Sumire dotes on him obsessively, whispering lewd words in her unique, creepy way of speaking. Her uncontrollable love for her stepbrother spirals out of control and escalates more and more!