I really liked this manga a lot. 10/10 on the story and character. Like the tiny plot twist with the child's personality, I don't want to write spoilers but it's really good as it increases the enjoyment of the manga. I like how the author adds in the devil's past and everything. There aren't many characters in the manga but the ones that are there are well developed for a short manga. The manga drew me in making me want to finish it in one go. It was overall put well together. The art is definitely a 10/10. O my gosh the art is so beautifuland clean. Specifically, the child and the devil's human form were really nicely drawn.
Overall this manga is definitely a 10/10. I 100% recommend but beware some sites may not label it as a tragedy but it is. The ending however can be seen not as a tragedy as I really liked it a lot and that that it was a fitting ending for a manga about a devil and a human.