Yoshino Hashiba shows us her secret masturbation time, which she can't tell anyone about. Behind her cheerful smile, she is a nymphomaniac who sinks an extra-thick dildo into her hole and swings her hips as her desire dictates. The vivid sounds of her flesh as the foreign object is relentlessly thrust in and out of her private parts, which are slippery with lotion. The awareness of being watched heightens her sensitivity, and eventually she can no longer contain herself and climaxes repeatedly on her own, a complete transformation. An uncensored camera captures the true image of a girl trembling in orgasm, her mucous membranes stretched, and her love juices dripping, in this shocking monologue recording.