Dafu is one of the original members of the Litchi Hikari Club, alongside Tamiya and Kaneda. He's extremely loyal to Tamiya.

For the sooty industrial town's lads there's only one point of light: the Light Club, a secret brotherhood they've organized in an abandoned factory. They're on the verge of booting up their crowning achievement, a "thinking machine" fueled by lychee fruits. At the same time, the middle schoolers' cooties-fearing solidarity is devolving into a downright National Socialist muck of murderous paranoia, perverse aestheticism, and (not always) suppressed homosexuality.
 
(Source: Kodansha USA)

Prequel to the series Litchi Hikari Club by Furuya Usamaru, Bokura no Hikari Club follows the lives of the nine club members before the events of Litchi Hikari Club. 

A short, comical anime adaptation of the psychological-horror manga, Litchi☆Hikari Club. 
The story is about nine boys who are members of the Hikari Club and their self-made AI robot, Litchi. They are led by their leader Zera and keep a kidnapped girl named Kanon.

Katsuya Tabuse