Tonari no 801-chan R (2009)

Tonari no 801-chan (となりの801ちゃん, Tonari no Yaoi-chan, lit. My Neighbor Yaoi-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. An anime adaptation of the original manga was planned to be produced by Kyoto Animation and broadcast on TBS to begin airing in Japan in 2009, but was unexpectedly canceled. However, a 90-second "opening anime" called Tonari no 801-chan R (となりの801ちゃんR) was produced by A-1 Pictures and directed by Yutaka Yamamoto; it was bundled with the fourth volume of the original web manga released on September 10, 2009.

Unfortunately the movie Tonari no 801-chan R is not yet available on HBO Max.