Sono Hanabira ni Kuchizuke o: Watashi no Ouji-sama

I am Kitajima Kaede, and I am not really good at dealing with people. I'm also the class rep.
In school, I run into my cousin Sara, and suddenly I find myself sharing a passionate kiss with her!
In the years that I haven't seen her, she's grown into a cute, outgoing girl who has become a famous model.
Even fashion magazines know about her, and many in my school idolize her. She makes me look extra dull by comparison.

And yet she calls me out from afar and clings to me, heedless of the stares people give us.
Because I don't like to stand out, I instinctively act coldly towards Sara.
But then she suddenly pushed me down. She whispers to me,
"I want everything there is you."
Such joy, such bliss and such embarrassment. What's to become of me?

From DLsite