Kotoko-chan is 'different'.

Diligent and shy Kotoko Haruyama has a lot of expectations riding on her.
Burdened by stress, she develops a strange habit.

That is, whenever she realizes someone is looking at her lewdly, she reciprocates just a little, somewhat erotically...

But her strange little habit gets bolder and bolder and...
she eventually falls prey to the ploys of perverted men...