In the hushed, dimly-lit confines of their family home, a curious young sister sneaks a peek at her brother's forbidden stash of eroge games. As she loads up the latest title, her eyes widen in shock and arousal at the graphic, animated debauchery unfolding on the screen. Following the game's lead, she dares to touch herself, exploring her newfound desires, as her brother's voice echoes in her mind, guiding her through the explicit, anime-illustrated tutorials on pleasure and release.