This one hit kind of hard. Like the other commenters, I feel this was meant explicitly for me.
Living like Ayumu, there's times I want a Nagi.
But at the same time, I think Nagiko is better for me. She keeps me hungry. I can cook for myself.
In terms of a review:
-Music perfectly fits the atmosphere.
-UI is impressive, but there's some slight disconnect with the rasterization of certain elements. I can't decide if I care enough about it to mark it down as a negative.
-Spritework is okay. Nagi's design is good enough, though it's hard to take her seriously with those pom pom earrings.
-Backgrounds are okay. Once again, there's a certain disconnect between it, the UI, and the sprites. I think it's about the saturation. I understand Nagi is meant to be brighter and more colorful than the BGs, but the UI textbox is so blaring, some of the effect is lost. That's not to say the UI textbox isn't beautiful.
-Writing is above average, but I still prefer other ebi-hime works more. I think it has to do with the setting. Not much you can do in a plot like this.
-Unease as a mechanic works and fits the game.