User blog comment:Knowledgeseeker01/To Aru Majutsu no Index Facebook page/@comment-190.154.180.187-20130916190957

I have a question. To aru majutsu no Index 1 and 2 are related to "to aru kagaku no railgun" however does "to aru majutsu no index2" is after "to aru kagaku no railgun S"? What order is the best so that "to aru kagaku no railgun S" doesnt get spoiled?