In Un amour de jeunesse (aka Goodbye First Love), we follow Lola Créton from the age of 15 to 23+. Lola herself doesn’t turn 18 until later this year. At the three minute mark, we see Lola fully nude in bed briefly as her blanket is removed. The scene is in the trailer embedded below starting at 0:13. We then see more of Lola’s breasts in the mirror as shown in the trailer. Then at the 86 minute mark, we see the scene that starts at 0:26 of the trailer. Lola has her top removed and then her bottoms before they make out. Lola’s legs are kinda crossed this time so you can’t really see anything below.