If you liked
Pupa
|
...then you might like
Ranpo Kitan: Game of Laplace
|
Both are excellent shows that incorporate several main themes such as butteflies and the human condition with maturity behind a deceptive outer appearance.
If you liked
Usagi Drop
|
...then you might like
Uchuu Kyoudai
|
Adult people doing adult and responsible things. Both are rather slow-paced SoL shows that feature protagonists who discover a new goal in life and work diligently toward it.
If you liked
Moonlight Mile 1st Season: Lift Off
|
...then you might like
Uchuu Kyoudai
|
People aspiring to be astronauts for missions never seen before.
If you liked
Deadman Wonderland
|
...then you might like
Zetman
|
Both series feature rather dark themes and share the motif of justice. Also, both anime adaptions are subpar to their manga counterpart.
If you liked
Berserk
|
...then you might like
Hellsing
|
You like lots of gore & blood, massive action, some (very) naughty scenes, religious themes, amazing art and kickass main & side characters? Then go and check out one of the best Seinens out there!
If you liked
GTO
|
...then you might like
Yakitate!! Japan
|
Both are good examples about how every theme could be turned into an successful and award-winning shounen. Yakitate!! Japan and Great Teacher Onizuka both feature an amazing and likeable main character as well as good and well-written side characters and a hilarious plot - in a good way, of course ;).
If you liked
Blame!
|
...then you might like
Maken X Another
|
Both of them feature the same sketchy drawing style, unique weapons and an intelligent, yet somewhat subtle plot.