Maina was someone I met to buy used panties from. When I told her I wanted to inspect the stains at a hotel, she looked slightly confused. [1st Pair: Patterned Pink Panties] First, I savored the panties she had been wearing that day. Receiving the day's stains was a blissful experience. When I said I wanted to see the panties she had on, she appeared shy and embarrassed. As I hungrily sniffed and licked the well-stained fabric, she seemed frightened by my actions. Wanting more stains, I had her stimulate her pussy herself, adding fresh wetness. The new stains mixed with the scent of sweat only heightened my excitement. [2nd Pair: White Panties] Next, I made her press the panties tightly into her skin to transfer more odor. The way the fabric dug into her pussy and ass was incredibly arousing. As I began touching her through the soaked material, her moans echoed lewdly throughout the hotel room. Looking at the panties, they were clearly stained. Bringing my nose close, I inhaled the dirty scent mingled with Maina’s body heat. [3rd Pair: Black Panties] I then tortured Maina with a dildo-shaped vibrator. She looked scared at the sight of it. Seeing her fear excited my sadistic side. Pulling the panties aside and inserting the dildo was an intensely filthy sight. Whether from pleasure or not, her thrusting grew faster and faster until she climaxed, grinding her hips. Immediately, I soaked the panties with her juices. Sniffing the soaked fabric, I smelled a sweet, lewd aroma. [4th Pair: Pink Panties] This pink pair already had satisfying stains, so I decided to purchase it as-is. [5th Pair: Blue Panties] Next, I had her stain the panties using a vibrator. As soon as I applied the vibrator, her body reacted sensitively—her moans grew louder and the panties quickly became drenched. I desperately wanted to taste these soaked panties right away, but I restrained myself, saving them for slow enjoyment later. [6th Pair: Light Blue Panties] For the navy-blue panties, I had her pee on them. Though confused by the request, her obedient response turned me on. As she released a large amount of urine, I could tell she was aroused—drops of mixed pee and pussy juice trickled down. Soaking the panties with her urine, I sniffed deeply, detecting ammonia layered with a faint sweet trace of her arousal. [7th Pair: Pale Pink Panties] This time, I manually fingered her to create stains. Slipping my hand into her panties, I found her extremely wet. From my fingering, she reached intense pleasure and released abundant juices. The stain left by my hand job carried an indescribably nasty, arousing smell. Maina seemed confused at first, but she turned out to be an extremely sensitive girl. Perhaps because she enjoyed my dominant nature, this masochistic girl promised to meet me again.