No graphic nudity or sex in the show.

Romantic tension and even love triangles between the teenagers.

In an early episode, a boy attempts to undress an older woman while inviting her to a small party set up by him and his friends. He unzips her spacesuit from the front, only to realise that she's wearing nothing but her lingerie underneath. She leaves her spacesuit on and some cleavage can be seen for the remainder of the episode.

In one scene, a teenage girl's panties can be seen when she removes her pants and jumps around happily. She and her friend convince some teenage boys to strip down from their uniforms to relax.

Frequent scenes of sci-fi violence involving giant robots, weapons of mass destruction, shootouts and all other kinds of military conflict. A group of teenage characters find themselves being pursued and attacked constantly by a fleet of aliens with giant robots.

The US and USSR bases on Mars destroy each other with atomic weapons. The aftermath of one attack can be seen when the main characters find piles of dead bodies at the entrance of a bomb shelter.

The first episode begins with an attack on the UN base by a group of alien mecha. All but five teenagers and their teacher are killed in the attack, including many UN personnel. Most of the teen cadets are crushed under debris and parts of their limp bodies are visible under the rubble.

The series hasn't been licensed in English until now, so expect foul language depending on the fan subtitles.

The character of Gresco is a violent and ruthless psychopath. In one episode, he snipes defenceless UN personnel in the middle of the Martian desert, laughing with glee while doing it. He intimidates other characters and won't stop at nothing to kill anyone who gets in his way. His scenes are terrifying.

The anime is set in an alternate timeline where the Cold War continued until the 90s. There's constant talk (until the second half) about the US and Soviet Union getting ready to start WWIII. The nature of war is discussed by some characters and the teen cadets wonder about whether or not they have a future.

The Demon Death Squad are very creepy and psychotic in their behaviour.