The original story of this manga was a novel that I spent a span of 6 months writing in the 9th grade when I was 14 on pretty Lovely White notebook paper ^_^. I am now in the eleventh grade and 17 and I have nothing better to do but turn it into a comic ^^;;
There really isn't a difference to the both of them. I may have added more to the comic, and the story was narrated by Allanah (the manga is too, but not as much) and I've been told by the readers of the story that for whatever reason (keeping in mind I cut nothing out), the manga is more lighthearted @_@.
Security Blanket, or Iyashi no Mofou, as it has been kindly translated to by my friend, Katoh, is a shoujo story. There's no doubt about that. But you won't find flowers. I'm too lazy to draw flowers. If you find a flower, e-mail me and I will draw you another flower to go along with it.