[Mayoineko (Leonardo 16sei)] My Stress Relief Method (COMIC LO 2025-10) [JnTo]

An anxious teenager asks how to relieve stress, only to discover his older sister secretly masturbates every day, a habit that erupts when he unexpectedly stumbles upon her in the bathroom. Despite her admonition that it's forbidden, the sister invites the boy to join her, turning their private moment into a heated game of ‘play’ that includes oral and manual stimulation, heightening the thrill of risking being caught by their parents. The tension peaks as she urges him to continue, culminating in a climactic release while she pleads not to stop suddenly, sealing their illicit bond.