Though it's older, it's still really good. This anime is a spin off to To Aru Majutsu no Index, AKA A Certain Magical Index, focusing on the side character Misaka. IMO, Railgun is a LOT better than Index. So, even if you didn't enjoy index, give this one a chance. Both Index and Railgun have 2 seasons, which Crunchyroll hasn't released yet it seems, so we'll have to wait for those to come out.