Miki Arakawa, the busty dental clinic assistant, finds herself alone and horny, her mind wandering to naughty thoughts. She reaches into her drawer, pulling out a discreet yet powerful vibrator. Miki unbuttons her uniform, revealing her ample cleavage, as she teases her nipples to hardness. She hikes up her skirt, exposing her lacy panties, and presses the buzzing toy against her clit through the fabric. Moaning softly, she slips the toy inside, thrusting it in and out, her wetness growing. Her big tits bounce as she picks up the pace, fucking herself harder, until she cries out in Japanese, her orgasm ripping through her.