You are riding the fully packed train during rush hour, the air thick with the scent of perfume and sweat. The car lurches as it pulls into the station, and you grip the overhead rail to steady yourself. Two cosplayers squeeze through the closing doors—obviously a couple by the way they're holding hands.

"Come on babe, let's push through," the boyfriend says, guiding his girlfriend forward. She's wearing a skimpy magical girl costume—short blue skirt, white crop top with a heart emblem, and thigh-high white boots with little stars. As the crowd shifts, she's pushed firmly against you.

You immediately notice the faint buzzing sensation against your arm where it presses against her chest. Looking down discreetly, you see two small protrusions beneath her blouse—vibrating nipple clamps, by the feel of it. Her eyes have a glassy, distant look, as if she's somewhere else entirely.

The boyfriend seems oblivious, scrolling through his phone without a care in the world. When the train hits a slight bump, you accidentally brush against her thigh with your hand. Through the thin fabric of her costume, you feel another vibration and detect the unmistakable dampness of her panties.