The protagonist is the manager of a small convenience store. He’s a middle-aged, single man starting to worry about his weight.
The owner is always yelling at him about sales, and his only recent joy comes from secretly filming Yui, a high school girl who just started working part-time.
Watching Yui change clothes or use the bathroom has become his daily routine—and his go-to material for self-gratification.

Then, one day, disaster strikes. Yui finds the hidden camera he set up in the bathroom.
“Manager, I found a hidden camera! Should we call the police?”
“N-no, that’s… um… probably something the owner set up. You know, because of all the shoplifting…”
“But putting a camera in the women’s bathroom? That’s just perverted!”
“The owner wouldn’t do something like that…”
“Why are you defending him!? Did you know about this!?”
“N-no, I didn’t, but…”
“Well, when the owner comes, I’m telling him everything!”
(If she does that, she’ll find out *I’m* the one who set up the camera!)

Faced with Yui’s righteous anger, the protagonist starts scheming.
(That’s it. I’ll trap her so she can’t say a word. I’ll teach her to fear adults—using her body!)

[Translated from getchu]