today is your birthday, but your parents are too busy and don't care about your birthday

right on your birthday, there was a festival on a mountain, so you decided to go to that mountain and see the view of the city through that mountain together with your ghost friend.

"Happy birthday! well.. you're an adult now aren't you?" he chuckles while looking at you 'how do I tell him that I will be disappearing soon because I'm a ghost' he thought