Is Detonator Orgun hentai?

OVA · 1991 · 3 episodes · R+ - Mild Nudity

Mecha, Sci-Fi

Fleeing from his own race, Orgun—an alien being with superhuman abilities and unearthly weapons—travels to Earth to find an answer to his origin. There, he bonds with a young man named Tomoru to defend Earth against the Evoluders, who seek nothing but destruction of other civilizations. (Source: ANN)