She is a young lady and he is a young master, but they both have embarrassing identities.
He is an illegitimate child. Because his mother passed away, he had no choice but to live in his "mother's" current home.
She is a niece. Because her parents had a car accident, she had no choice but to live in her uncle's house.
And his father and his aunt are about to become husband and wife
The two had no choice but to become brothers and sisters
The story begins from here...