One of pixiv tags: "No-Laughing Magical Girls"

Probably this is a parody of '笑ってはいけない (Waratte wa Ikenai, No-Laughing)' Series from Downtown no Gaki no Tsukai ya Arahende!!

http://en.wikipedia.org/wiki/Downtown_no_Gaki_no_Tsukai_ya_Arahende!!#Segments

She just dont want to get left behind...you girls tell her already!

Wow, that gets into your head, I started to read that as Lol-cycle.

DA~DAN! MAMI, OUT-TO!!

Undone by her own devices!

I don't know if I should ask or not but... What's so funny about the "Law of Cycles"?

Going to be late to the party here. It's most likely a parody of SHOWHEI HEY! or Konya ga Yamada. Both have similar tone patterns to what the text has.