Noipa-chan Is Dangerous! is a Manga/Manhwa/Manhua in english language, Ecchi series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

At school, no one seems to care what transfer student Noipa-chan wears. In fact, they don't even seem to notice her existence, except for one person. Yuu is the only one who wonders what's going on with that girl.