[Rico-ba (Rico)] Onii-chan to Sex Kenkyuu [Tenuous Scans]

An eager teenage sister with glasses leans over her brother, her mouth wrapped around his throbbing cock as she gasps for more, her eyes wide and lips trembling in a feverish ahegao. She then slides her tight, wet pussy onto his hardness, the intimate act captured in vivid panels that show her ecstatic cries and the intimate contact of their bodies, emphasizing the raw, incestuous passion. The sequence builds to a climactic release, with her climaxing in a messy, deflowering climax that highlights the intense, taboo intimacy between the siblings.