Oppa, Just a Mouthful

오빠

"Please… I just need one mouthful." Gayoon has lived as Taejun's little sister for fourteen years, secretly in love with him the whole time. But when she accidentally catches him in the act of pleasuring himself, his "thing" becomes all she can think about. In the end, she can't resist begging him for just a single mouthful, promising to let it go if he gives her that much.

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