Story: The story is nothing unusual, it is an office romance kind of dynamic mixed with a little bit of contractual relationship, but the setting is what makes it different from the rest. The setting is in the underworld. Tomari, female lead, just starts working on a new department under, our male lead, Chikage. Their relationship starts off as a contractual engagement by accident and soon develops into something more. The story is full of funny moments that I personally really enjoyed. So for that, I will give it an 8. It is good and entertaining, but nothing out of the usual. Art: I really loved theart, I think it was beautifully done, very consistent. The art style is on the cute side. Every single character looks great, backgrounds are awesome too!
So for art, I give it a 10, I just loved it.

Character:

The characters were good, but I feel they were a little bit too exaggerated. Chikage doesn't care about anything, and he really doesn't. Tomari is a tsundere, and she's even too shy to hold hands. Chikage's brother has a brother complex, and he would literally kill for him. So sometimes it gets a little tiring for every single character to be too extreme. Therefore I give it a 7.

Enjoyment:

I found it really easy to read, the story was easy to follow, drawings conveyed the right feelings. I genuinely enjoyed it, the only thing I didn't like is that I felt the ending was kind of rushed. I felt the protagonist were in the process of realising their feelings when suddenly we are in the last chapter.
Still, I liked it so it is a 9.

Overall:

This is a great shoujo manga, it is fluffy, funny and entertaining. The couple has definitely chemistry, so I really recommend it if you like a cute rom-com in a fantasy setting.