Basically, I remember the story having 3-4 chapters. It was about a girl who was basically like the perfect shoujo main character, having windows seat, and stuff, all the cliches, but in the last chapter it was revealed that everythink was fake, and she used to be just a normal girl wanting to be perfect-shoujo-mc-like. it was kinda creepy, i guess.

up

up (pardon)

found it. the title is WataShu