Music: (
Story/Location) If a title deals with music as significant element of the story, and / or the lead characters are musicians and this is significant for their role in the story, then use this keyword.
Idol Project is a story about the pop business,
Aquarian Age is a story about a rock band,
Rahxephon is about using music to 'retune the world' - they all belong into this category.
Video-game inspired: (
Type subgenre) The usual way for an anime to make it to the small screen is from a manga. Sometimes though the anime comes from a video game instead.
Gungrave is a classic example: Take a video game from Sega about a undead who fights with musical instruments and create an Anime about love, friendship, betrayal, and a few demons. See also: "
Dating Sim Spinoff".