Feryquitous is an alias of a Japanese composer, Kazuki Terao(寺尾一輝), also known as An. He is known for his works in BMS such as TearVid and Xhroria. Influenced by onoken's long version of his BMS song, felys, Kazuki began composing in 2009. In 2012, together with graphic designer レク (Reku), Kazuki formed AcuticNotes music circle, publishing his albums until 2015. Since then he has not been composing his songs under his An alias until sometime in 2018, when he would release his latest album under AcuticNotes circle after four years.