DSOD-076 - POV of an extreme slut with big breasts and glasses who whispers to her, "Are you holding back when you're about to cum? You're so precious," and her reason is destroyed and she cums repeatedly.

Sumire, an introvert nerd, has a step-brother after her mother remarries, and they end up living together. Sumire can't help but dote on her first step-brother and find him cute. Sumire, a secret nerd who can't control her feelings for her brother-in-law, dotes on him with a unique creepy way of speaking, whispering lewd things. Her love for her brother-in-law, which she cannot refuse, goes out of control and escalates!