Ayuri Kimura, a normal office worker, realizes she has been reincarnated as a character in an isekai manga.

She was reincarnated as Ashley, who coveted everything her older sister owned.

Since childhood, she had taken her sister's dresses, her necklaces, and now was even trying to steal her sister's fiancé.

But Ayuri was puzzled. This fiancé, Warren, isn't appealing whatsoever?

Why did Ashley want a man like this? As she pondered this mystery, Ayuri found a diary written by Ashley...