Does anyone know this movie? I managed to watch only the 1st scene many years ago, so my memory is very vague.

1st scene

Boy starts his first day at a new school. He arrives to his classroom and realizes he is the only male student. The females in the classroom (including the teacher) seduces him. There is one part where one female student and the teacher are topless, and they ask the boy to choose the breasts he liked. At the end of this scene he wakes up in bed to the first day of new school.