Anime Adaptations with No Manga

Manga is a wonderful visual-medium for most people. Some people even prefer manga over their anime adaptations probably because these are more detailed, and we’re not only talking about the art itself but about the story and the characters. You just tend to have more content and, sometimes, even more depth. However, what happens when anime adaptations don’t have what we would call an "already established source material”? While rare, these are not unusual, and here’s a list just for you because sometimes you just want to watch something without wondering if the manga did it better. 

• Cowboy Bebop (1988)
• Neon Genesis Evangelion (1995)
• The Big O (1999)
• Last Exile (2003)
• Samurai Champloo (2005)
• Code Geass (2006)
• Eureka Seven (2006)
• Gurren Lagann (2007)
• Redline (2009)
• Eden of East (2009)
• Angel Beats! (2010)
• Puella Magi Madoka Magica (2011)
• Symphogear (2012)
• Love Live! School Idol Project (2013)
• Kill la Kill (2013)
• Shirobako (2014)
• Terror in Resonance (2014)
• Death Parade (2015)
• Wish Upon the Pleaides (2015)
• Psycho Pass (2016)
• Princess Principal (2017)
• A Place Further than the Universe (2018)
• Violet Evergarden (2018)
• Promare (2019)
• Endro (2019)
• Granbelm (2019)
• Akudama Drive (2020)
• The Great Pretender (2020)
• Vivy: Flourite Eyes's Song (2021)
• Odd Taxi (2021)
• Wonder Egg Priority (2021)
• Sonny Boy (2021)
• Necronomico no Cosmic Horror Show (2025)

There you have it! Some of these received manga adaptations after their release, due to their popularity.