The Masquerade of Yn

_The story begins with a young girl who has experienced abuse from her birth parents for being a girl. After her parents died, she hid her identity and pretended to a boy. When she was adopted by a loving mother and daughter, she continued her charade. Eventually, the mom announces her intention to marry a man with seven boys and one girl. That girl develops a crush on the adopted girl and clings to her, admiring her. Will the adopted girl reveal her identity? Or will she keep the secret at any cost?_