Wait, My Adoptive Sister Is a Mafia Heiress? Who Gets It?

[One female lead + no System + no NTR]

What’s it like to find out that the wealthy family that adopted me is actually a crime family?

What should I do when the crime boss’s daughter has been plotting to get her hands on me since we were kids?

What should I do when I’m the crime family’s sole heir, but I accidentally get seduced by the daughter of another crime family?

…

My name is Jiang Chen. I ran away from home when I was young and was adopted by the Lin family, where I became a girl’s little brother.

My job from childhood was to protect her and play the part of her well-behaved younger brother.

I thought I’d be able to live an ordinary, happy life from then on, but reality, that bitch, slapped me hard in the face…