ecchi

or et·chi

[ ech-ee ]
/ ˈɛtʃ i /

adjective

noting or pertaining to a subgenre of Japanese manga, anime, computer games, etc., characterized by light, playful sexual themes and imagery.

noun

such themes, imagery, or works; soft porn.
Compare hentai.

Origin of ecchi

from the Japanese pronunciation of the letter ‘h’, the first letter of hentai