This is a very cute show. It's a well done parody of Assassination Classroom that manages to parallel the original plot while not taking itself too seriously. The characters are all well reimagined and stand firmly on the line between characterization of themselves and a person with actual depth, leading to some pretty funny moments. The underlying plot unique to this story is pretty clever too as it both makes perfect sense and is absolutely absurd at the same time. It's definitely not a show to watch if you have't seen the original, however, as it requires background knowledge and would probably notbe all that funny without it.
Overall, if you are looking for a cute, lighthearted show, this is a must see!