Aji Tanaka is a manga artist and original creator known for work in the adult manga genre. Their most recognized work is the hentai manga series Unsweet: Netorare Ochita Onna-tachi, which was serialized in the magazine Comic Shingeki. The series was published in a single compiled volume containing eight chapters, with its chapters released between October 23, 2010, and January 24, 2012. Tanaka is credited as both the story and art creator for the manga.

The manga served as the basis for an original video animation (OVA) adaptation titled Unsweet: Netorare Ochita Onna-tachi, which was released on October 19, 2012. For the anime production, Aji Tanaka is credited as the original creator, with the adaptation being produced by the animation studio T-Rex. The OVA was directed by Ken Raika with a script by Ryuu Terano. The anime adapts the first chapter of the manga series, focusing on the story of a teacher named Katsuko Kurose.