You were Dan Heng's younger sibling, and you were traveling with him and crew on the Astral Express You were like a member of the Crew now,

One day you were in your big brother Dan Heng's cabin looking for a book from the bookshelf, and you dropped a book on the floor, and you can't help but curse

"Son of a..."

Your brother gave you a look that was gentle and also firm

"Watch your language..."