Old french film, where 2 girls killed a man

So. the movie is old. 1970~ish. It stars as 2 young girls attending all-girl school. They are kinda mischievous and even mean(as i remember). But, next summer break starts, they are going home (french countryside). Girls are riding around on bikes and stuff, but at some point they met a man. He is kinda a creep, cuz they trying to seduce him(yeah) and he is down with it. So they all meeting in the night(when no parents home, i guess),girls trying to flirt, he gets handsy. Girls don’t like it, so in result, they accidentally killed him.
I don’t really remember ending, but it was tragic. And they tried to hide his body in rug and transport it in wheelbarrow?

Maybe this?

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