 One was adapted twice into original video animation ( OVA ) series . The first was an all ages OVA titled One : Kagayaku Kisetsu e produced by KSS ; four DVD volumes were released in Japan between August 10 , 2001 and May 24 , 2002 . The all ages OVA is loosely based on the original One visual novel and is drawn with a different setting . The second series , produced by Cherry Lips , was an adult OVA under the title One : True Stories . Three DVD volumes containing a single episode each were released between November 21 , 2003 and May 28 , 2004 . One : True Stories was later licensed for English distribution by Media Blasters and the three episodes were released in a single volume on August 16 , 2005 . 
