Torajima!

is a Japanese light novel series written by Taro Achi, with illustrations by Tateha. The series began publication on August 10, 2007 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Eita Marumi is a high school student who is a little dependable. Living with two mothers and children, the mother is quite unique. Eita gains a mysterious power because she wore the striped pants that her mother bought at a second-hand clothing store. These pants are genuine demon pants. It was to give the power of the demon to the person who wore it. Eita gained more than just the power of demons. I made a girl friend named Louis by connecting with the demon costume. And even more ... Eita-kun, a high school student with a history of not having a girlfriend. A little gorgeous Seishun is about to begin ... maybe !?