In addition they often adhere to certain genre conventions, the emphasis on training and practice in preparation for competitions, characters desire for self improvement, and pursuit of a specific goal. Note that novel means book with words in paper, so no comics and no "visual novels", which should go under manga and dating-sim - visual Novel/erotic game respectively.Note that it can be applied to novels as we know them but also the typical light novels for teens and young adults, which are common in Japan and aside from being short include a number of illustrations.
While the ending did feel a bit flat (still needs to see the OAD) it is well worth the watch.R-15 tries to focus on the weak plot and romance, but is completely overtaken by the hardcore ecchi. The premise of the school aside, this is supposed to be a ecchi harem/romance with light comedy.However, nothing is terribly funny, the harem is only partial, and (if you're watching the TV version) there is minimal ecchi.Their interactions are romantically or sexually loaded.The female characters often draw heavily from stock archetypes.
The harem may be only a support to an existing or predictable relationship, or the lead may end up in relationships with most or all members.