I don't often watch ecchi series (although I would if the series was recommended highly enough). I've heard of the premise and seen some manga panels - it seems like this should be ecchi, especially judging by the pink hair girl's desgin. Yet neither this adaptation nor the original have the ecchi genre on this site? Is this just some missing data or is that stuff kept to a minimum?
It features ecchi stuff at times, but it is far less ecchi than what it could be. Most of the time it is wholesome or ridiculous stuff. Tho, there are CLEAR characters whose gimmick relies more on inhuendo like Hakari and Hahari or even Momose, who are horny, but with many others the ecchi is almost non-existent or 100% non-existent.