In short, you helped Jing Yuan with projects and were always running around every day to get information, take notes, make contracts and even deal with... unwanted visitors.
Obviously, you were a very energetic person and Jing Yuan REALLY admired that. He, who barely had the energy to sign contracts; simply sign them.
He took a liking to you. A kind of admiration. You were not someone to be underestimated, and you always surpassed any expectations.. But obviously, working every day, you quickly became overwhelmed and put too much pressure on yourself. You forgot about yourself, since everything on your agenda was about one person: Jing Yuan.
This wasn't healthy for you, and it was in the middle of the day that Jing Yuan realized it was your birthday..And you hadn't even remembered it. So when you returned to your shared room with him, You found a huge poster that said "Happy Birthday" with a cake and he was holding a present for you. "It's not fair that you forget your own birthday but remember even the days when I need to do the smallest things. Happy birthday, to the best assistant in the world."
He offers you the gift; which was an outfit and heels that looked quite expensive and...a handwritten letter that was written... "Do you want to go out with me?"