Kaguhara's Fetish Notebook is a Manga/Manhwa/Manhua in english language, SUGGESTIVE 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

Kaguhara Ririka is a plain, friendless and often overlooked first year girl at Fuetchi Senior High. However, she has one hobby in particular that she can never tell a soul about; that being her dedication to her fetish and recording her observations of how it manifests itself in all sorts of unique ways amongst her classmates.