well... the definitions depend on POV...
actually, i have the "same standard" as question :
-ecchi : rather "+14-16" : pantsu/cleavage/shiny skins shots, with(out) suggestive poses, terms etc.
-hentai : solid "+18" with total nudity, blatant sexual intercourse, with(ou) perversion roaming inside.
but meh, guess people already understood this so
on that matter, it will be probably suggested, just like KGNE as people has stated.
ho, when you are talking a "lot", you mean makoto is trying to bang a girl like... at least once in each "episode" ? (i feel i'm gonna hate this character even before it is aired... this is scary
)