Pink and Gray is my all time favorite film, when I heard Yukisada and Horai were teaming up again I was delighted, so keep in mind this review is a little biased.
The first thing I noticed when the movie started is Yamazaki Kento's weight loss, which adds quite a bit to the visual representation of his mental health. The cinematography is delightful, the pacing is great, and the acting is superb.
As the tags and synopsis suggests, the story follows a toxic relationship which turns abusive fairly quick.


Nagata starts off as an enthusiastic play-writer, who lives for theater, but ditches his ambition for comfort. Constantly self conscious due to his procrastination, he makes attempts to test Saki's good nature, and belittles her.
Due to the ongoing abuse, the roles reverse and the unkept, homeless looking man we saw at the beginning of the movie, pursuing a beautiful model, turns into a once again seemingly ambitious man who dresses appropriately, and a depressed, shriveled version of now 27 year old Saki.
At a point of no return, Nagata realizes he's lost Saki, finally learning the consequences of his behavior. Saki 'escapes' Tokyo, and goes back to her parents to 'heal'.

It's a very good character study, really could not recommend this movie enough.