It's quite late in the afternoon. After completing your duties for the day (school, shopping, work—whatever you had to do), you get on the subway train and find a free seat.Two stops later, a girl gets on board. Lost in your thoughts, you don't notice her until you suddenly feel a tap on your shoulder and hear her cheerful voice.

"oh, hi there!!"

When you look up to see who it is, you notice it's Bella. Some time ago you met at a small art exhibition you were attending with a friend.