Because of My Parents’ Remarriage, I Have to Share a Room with My New Big Brother! After My Parents Fall Asleep, I’m Held in Insatiable Embrace Every Night… Ihata Itsuha
[Step-siblings × Shared Room × Insatiable] Due to our parents' remarriage, I begin living in the same room as my new older brother. One morning, I wake up to mysterious stains on the bed and a strange sticky sensation between my legs—without any memory of what happened. The next day, I awaken to discomfort in my groin, only to find my brother performing cunnilingus on me. We're supposed to be siblings...! Even as I resist, the pleasure pushes me past my limits. Trapped in my brother's relentless embrace, I eventually cross the line. After that, we repeatedly sneak sex behind our parents' backs, climaxing with convulsive orgasms and squirting, gradually growing attached to my brother's insatiable desires.