To simply explain this work in one word : WHOLESOME
This work has one of the most beautiful storys and characters so wholesome that you would just want to be in love. All storys and settings are placed around couples or people who are lovers, main focus or Core of all the manga can be called commitment, relationship, pure love, or just as I said WHOLESOME.
We see chemistry in characters all the time and then that chemistry turns into love obviously so at the end we just want them to you know have sex so in this what jorori sensei did is simply put some elementary chemistry and then you know THE PLOT that's what this makes it one of kind you can say.
Art is simply next level the details, the background, the story setting is made so beautifully that it can be on top of any hentai manga top 10 I say!
So anyway give it a try.