The tag "kamihime-project-r" refers to a specific porn content that belongs to the Kamihime Project series. This is a Japanese adult animated series created by Illume, Inc. The term "R" in this case might be referring to either the "R-18" rating which is given to adult-oriented content in Japan or it could possibly be an abbreviation for "redubbed" or "remastered".
Kamihime Project is a collection of hentai anthologies based on Japanese mythology and folklore, featuring various characters like Amaterasu, Tsukuyomi, and Susanoo. The series explores themes such as magical girls, schoolgirls, mecha, and fantasy worlds. The artwork style is similar to that found in many eroge (erotic visual novel) games.