It's AIC Asta, actually. The production was riddled with problems from the start (tweets about animators not getting paid, unhappy staff, etc) and it showed in the anime itself. So many episodes hampered by terrible art... it's a pity because I would've stuck with it to the end FOR CHIE (my flavor of the month p4 waifu back then with the JP dub).
Yup, AIC A.S.T.A, and GunxSword was (IMO!) their best animation.
Shame about the production problems. I hope Persona 3 the Movie doesn't get hit by that. P4A was genuinely good looking in scenes where they didn't have issues.