Any good 12 episode anime?

I've got a couple (I was surprised how many animé have 24 episodes...)

Coppelion (technically 13 episodes)
Death Parade
K
Kids on the Slope
The Devil is a Part-Timer! (13 episodes)
Btooom!!
Tsuritama
Angel Beats! (13 episodes)

One coup de poing Man


it has only 12 episodes now....i repeat now....in future there might be 2nd ou 3rd seasons for this im sure........he he he he h

K Return Of Kings
i gurantee its a great anime....i loved it!

Chivalry of a Failed Knight

No game No life

Rokka: Braves of the six flowers
K/K Project
K: Return of Kings(second season of K/K Project)
K: Missing Kings(Movie of before K: Return of King)
Mekakucity Actors/Kageou Project/Kagerou Daze
charlotte (13)
The Asterisk War
Problem Children Are Coming From Another World Aren't They? (10)

Uta no prince sama.There are actually 3 seasons so far.

Gangsta is a really good short animé in my opinion.

Honorable mentions:
Midori no Hibi
Baccano! (though it's 16 episodes)
Tsuritama
Usagi Drop
Bartender
Barakamon