You have 4 of 4 known Commodore Amiga CD32 - Homebrew - Multimedia (TOSEC-v2012-07-22) sets

AIKa New Missions 1 - AIKa Special Trial (2005-06)(AMIGA Anime CD Project)(IT)[CDXL video]
AIKa New Missions 2 - AIKa Trial 5 (2005-07)(AMIGA Anime CD Project)(IT)[CDXL video]
AIKa New Missions 3 - AIKa Trial 6 (2005-08)(AMIGA Anime CD Project)(IT)[CDXL video]
AIKa New Missions 4 - AIKa Trial 7 (2005-10)(AMIGA Anime CD Project)(IT)[CDXL video]