Nothing to Explicit fairly clean TV show.

No real Nudity, and No Sex at all.

One character is a masochist and acts suggestively whenever thinking or experiencing pain.

One tongue-in-cheek homophobic joke where a character bets another character "likes guys" because he's a masochist.

in the beginning we see that the teacher is watching a stream with a girl in her underwear

The plot point of seven different people all sharing the same sense of pain (headaches, for instance) is discussed frequently, but no blood or gore is really ever seen onscreen.

A girl pushes a boy down a long flight of stairs; he's later shown being wheeled on a "hospital" stretcher for treatment.

Pretty standard language ("hell," "damn," etc.) for a TV-14 show.

Word "shit" is used.

Some uses of "ass" and "piss"

Lots and lots of teenage drama, which, of course, gets pretty sad/distressing at times.