The title is roughly translated as "680 yen salty grilled black Japanese beef tongue."

The song was used as ending theme for TV Tokyo's 2005 anime series Black Jack.

The b-sides included on the maxi single are all related to meat types with its respective prices.

The music video for "Kuroge" was also sexually suggestive, as it featured Ai in a black dress in a restaurant trying to seduce a man (portrayed by Kou Takasugi) by feeding him.

It goes between those scenes in that order until at the end, when Ai gets the man to come into her bright blue room, only for him to eat her food and fall through a strange hole.