What to say about this manga ?
Well, to begin with, it's Yoneda Kou, which in my biased opinion makes it already a good manga. This manga is a collection of stories, so I will review them individually, then the book as a whole.
The title story, NightS, is fairly standard Yoneda Kou. The story is about a Yakuza who hires a 'transporter'. While I personally didn't find it particularly captivating, it was presented nicely. The pages of colour were very beautiful.
The second story, Emotion Spectrum, was the best story of the book in my opinion. Kugo notices Usui always staring at Nakama, his friend. Kugo offers to help Usui confess. The mood of this story is really chill, and the progression is natural. The confession scene is adorable. It is quite chaste, only a kiss, but I don't feel like its lacking.
The third, and final, story is called Reply. It is about a shy mechanic, Seki, who falls in love with a salesman, Tamaki. The set-up of this story is very interesting. It is told from alternating perspectives, chapters one and three from Seki, and chapter two from Tamaki. I think that this style is very effective for this story, and is a great way of seeing both characters motivations.
At the end of the book has a short bonus related to the first story.
Overall I liked the book. It was not the most memorable, nor the best BL i've read, but the story telling and pacing of all the stories were good. There was no insta-love, which I am not overly fond of. I have re-read it a few times. I recommend it, particularly to Yoneeda Kou fans, and BL fans.