Bitter (disambiguation)

Bitter may refer to:
 * Bitter, a song by keeno featuring Hatsune Miku.
 * The Bitter End, a song by Nashimoto-P featuring Hatsune Miku.
 * Bitter Sweet, a song by Machigerita-P featuring Hatsune Miku.
 * Bitter Sweet's Beast, a song by Menday-P featuring KAITO.
 * Bitter×Sweet×fancygirl, a song by maya featuring GUMI.