Mei-chan, a cute and popular new working adult. She's utterly unguarded, constantly flashing her panties and giving glimpses of her breasts—completely lacking in self-awareness. Because she's my friend's little sister, I initially held back, but eventually couldn't resist and made a move. To my surprise, she became even more affectionate than usual, revealing a side of her that absolutely loves sex. Enjoy her defenseless, alluring body—could it actually be possible to start a relationship with her?