I have some friends aged 25-26.

Not some, but many. They are about 3 years elder of me.
Now I feel this age gap more than ever.
I remember I-san who I worked with at the book store. We know we are different, even if we really have a good relationship. Or, maybe that gap makes our relation nice.
We have a common difference which draws a strict line between us.
It’s not only with her, but also with any other friend in that age.
Sometimes I enjoy it, but sometimes not - especially when I think of one parson.