favorite is probably the one of Yoake No Ryuseigun




but i always get a chuckle from the cover of OVERDRIVE, is just so random and doesn't fit with the others

After reassesing, here are my current favorite album art in random order:

Singles --
1. Awanai Tsumori no Genki de ne (both limited edition covers)
2. Yoake no Ryuseigun
3. Scandal Nanka Buttobase

Studio Albums -- 
1. Yellow
2. Kiss from the Darkness - I give a ton of credit to Q-TA for doing disturbing yet splendid collage art!
3. Baby Action

This is a really hard choice... Let's see...

Singles:
1.- Haruka (Limited Edition A & Regular Edition)
2.- Kagen no Tsuki (Limited Edition Type A)
3.- Stamp! (Regular Edition)

Albums:
1.- HONEY (Regular Edition)
2.- HELLO WORLD (Limited Edition (CD+DVD))
3.- STANDARD (Limited Edition (CD+DVD))

They have so many great covers, it's hard to choose!


Singles:
1. Take Me Out - all editions (I love their outfits and Haru's hair!), but the Spotify cover for the 'Complete Pack' is my absolute favorite.
2. Kagen no Tsuki (Limited Edition, Type A).
3. Harukaze - all editions.
Special mention to the aesthetic covers of the singles they released under her. I love all of them!


Albums:
1. Queens are trumps - all editions! (They are queens.)
2. MIRROR - all editions (the designs evoke something in my brain; I wouldn't know how to explain it. The aesthetic, I guess.)
3. Hello World - all editions (they have a really unique vibe).