Although this is a short movie, it transports the emotions of the characters pretty good.

I guess, this is all about "If you don't appreciate what you have in a partner, do not be surprised if everything goes to waste". And "Every action causes a reaction, so be carefull about what you do."
Therefor, the person I most feel sorry for is Kazu. He is the one who is devoted to the relationship and does everything (and I mean EVERYTHING) for Shin - but is still wronged in the end.

The acting is on point, the cinematography well done (I rewatched it just because I did not get of the deeper meaning of some of the scenes at first) . For me this is not a feel good movie, but a realistic one (sadly).