Two dull people have a dull love affair in “Summertime,” a French drama that drags on like an August afternoon.

Izïa Higelin stars as a lesbian farm girl who leaves the countryside in search of wider horizons in 1971 Paris. There she drifts into a women’s lib group and falls for another activist (Cécile de France) who has a boyfriend but can’t resist her new friend’s allure.

I can; Delphine (Higelin) is a limp, foggy, mostly passive figure and the two women’s affair doesn’t seem to matter that much to either of them, though the film includes many graphic love scenes in a futile attempt to pump some life into events. Late in the movie, after a return to the farm where Delphine’s father lies ill, there is some low-level suspense about whether her mom will find out she’s gay and if so how she will react. But the tension is too little and far too late.