"You will know soon enough, how much I have grown."
Yui is a pretty young boy who comes from a good household, and is very skilled at poetry and the arts. He is very popular with the ladies of the imperial court, but the boy himself seems totally oblivious of his reputation and unaware of his affects on the opposite gender. However!! It is absolutely unthinkable that he should enter milady's room.
No matter how far you and him go back, you are not children anymore, so you should take great care in what you do.
[
From Hinata's notes]