This is episode 39 of 56 of Kissing the Wrong Brother. Play it below, then continue straight into the next episode — the whole season is free and needs no account.
The closing stretch of the season, where the arc pays off.
To win the heart of her crush before graduation, nerd Aria enlists the help of his dangerously charming older brother for a crash course in intimacy—only to discover she might be learning how to love the wrong guy. She asks him for lessons in sex and intimacy. And her crush's brother becomes her love coach.