Some girls are shown at angles showing buttocks or boobs.

A boy's bare buttocks are seen slightly in the shower, however this is brief and slightly covered by steam.

In one scene, a girl lays on her bed in a shirt and panties.

A few characters have exposed cleavages, but nothing explicit.

Monokuma teases Naegi and Kirigiri, asking if they were planning on doing "hot, steamy, and smooch stuff tonight."

One of the girls, Fukawa, is completely perverted and boy-crazy. It's played up for comedy though.

Murdereds have messages in blood on the wall.

Many executions/murders have blood in it but all the blood is pink not red.

The entire series is about a group of teens trapped in a high school, they only way they can leave is if they kill each other. Once a person is murdered, an investigation takes place and eventually a trial. If the wrong person is sentenced as the murderer, everyone will be executed while the real murderer is allowed to leave. However is the correct murderer is sentenced, they will be properly executed. This is the basis for the entire series.

Many characters are executed in the show, as graphic as that sounds, all of the executions are bizarre and designed like a deathtrap akin to something from "Looney Tunes". The characters do die though and although it's presented with dark humor from Monokuma (the judge/executioner/principle), the deaths are mourned and taken very seriously by other characters.

Lots of blood from the murder scenes and some executions, although it's shown as a hot-pink color and there is no gore. The series has a lot of dark humor involving death or pain.

A man is blasted off in a rocket ship, when the rocket lands and opens, it reveals the man's skeleton (albeit a very cartoonish one).

There are no f words in the anime, unlike the games, which feature a lot of f words.

Compared to the video game, language is much less intense and frequent.

Mild infrequent language. Mainly "damn", "bastard", "bitch", "slut", "hell", "dick", "shit" and "bullshit" are used.

Monokuma is shown drinking wine

Many excecutions are very intense to look at (only for some people) .

The dead bodies of the murdered are shown in an offsetting way, with a twisted, laughing sound in the background.

The entire series can be frightening and depressing. While the pink blood and occasional humor helps, many innocent teens are murdered so the murderer can escape. None of the teens willingly want to murder, but are basically forced to by the sadistic Monokuma.

The primary theme of the show is hope versus despair and as such, there are several sad scenes in the anime. But the heroes stay hopeful and remain friends despite the villain's attempts to crush that hope.

Several of the character's backstories are sad or emotionally intense. It's a very depressing series.