A Certain Scientific Railgun (Toaru Kagaku No Railgun)

A Certain Scientific Railgun (Toaru Kagaku No Railgun) / episode 18

is a certain scientific railgun (toaru kagaku no railgun) episode 18 filler?

yesit's filler

title: Asunaro Park

skip to episode 20
is a certain scientific railgun (toaru kagaku no railgun) episode 18 filler? — isitfiller.com