She debuted with the tankoubon "Show ga Hanetara Aimashou," published by Toukyou Mangasha. Her works have been featured in josei magazines and BL magazines. She has written a book called "Orokamono wa Aka o Kirau" (also published by Toukyou Mangasha).

Her nom de plume has also been spelled as "est em" by Deux Press and her real name is Maki Satoh. The author's preferred romanization of her penname is not capitalized (esuto emu, maki satoh).

Also a former student of Matt Thorn. Her classmate was TAKEUCHI Sachiko.