I Tried Erotic Massaging My Sister , a National Karate Runner - Up Ready to Die

My older sister is the captain of a powerhouse karate team and a national runner-up.
Her only redeeming qualities are her physical strength and her foul mouth.
She views me—her brother—as nothing but annoying and gross.
Yet, I can't help but see her sexually—she is, after all, a woman close at hand.
I want to touch her body somehow.
What about a massage...?
I want to touch more than just her arms and legs—I want to touch her breasts and buttocks, too—but if I tried that, she’d probably kill me...
Now, what should I do...?
Total: 24 pages
【 translation / English / English version 】