Tonari no 801-chan is a Japanese four-panel Internet manga written and illustrated by Ajiko Kojima. It centers on the relationship between a male otaku named Tibet and his yaoi-obsessed fujoshi girlfriend Yaoi whose obsession manifests as a small, green furry monster. Kojima started the manga on April 18, 2006 on his blog. Ohzora Publishing released the first bound volume in December 2006, and by June 2007, it had sold 150,000 copies.Serialization of the manga began with the first chapter in Ohzora's Romance Tiara magazine in April 2009, spanning a total of eleven volumes. The series concluded in 2016.

The yaoi fandom consists of the readers of yaoi, a genre of male homosexual narratives. Individuals in the yaoi fandom may attend conventions, maintain/post to fansites, create fanfiction/fanart, etc. In the mid-1990s, estimates of the size of the Japanese yaoi fandom were at 100,000–500,000 people. Despite increased knowledge of the genre among the general public, readership remained limited in 2008. English-language fan translations of From Eroica with Love circulated through the slash fiction community in the 1980s, forging a link between slash fiction fandom and yaoi fandom.