Oh my..this story is so nice!! XD I love it the way you protray Tezuka's feelings, as in how he will always become calm again whenever Fuji is around him. :D

that was so sweet!!
the way Fuji suddenly showed up in Tezuka's bad after he got mad was just... love

This is quite wonderful! You write very well, both in general and in terms of characterizing Tezuka and Fuji. It's all suitably understated, and yet touching. I like the sticky note, and where it turned up in the end. However, I did feel like the progression from the second to last scene to the last scene was a bit sudden. It seemed like Fuji was upset, but got over it or came to some decision on his own. I know he can be spontaneous and unpredictable, but I guess I would have liked to see Tezuka come to a realization on his own, or take a more active role in that, or at least apologize to Fuji.
It was a very lovely ending, though.