Honestly I started reading it because I saw it was ecchi while reading the Jump SQ magazine but everything in this manga is so absurd, most of the characters are completely crazy and the drawing style really reinforces the absurdity with amazing facial expressions from characters going psycho or being freaked out by another.
There isn't much of an actual plot in the end, it's really all about fun and giggles and some good ecchi here and there until the end with a decent length that's nor too short or too long.
A manga like this with ecchi and absurd humour is right up my alley hence the high grade. I also liked how the dynamic between the main male character and the main girls developped a bit as the manga went on, it gave me the nice feeling of watching a group of friends who are just messing around until the end.