According to the strip on its latest volume 4 cover, BL light novel "Sekaiichi Hatsukoi: Yokozawa Takafumi no Baai
" (which has a concurrently running manga named "Sekaiichi Hatsukoi: Onodera Ritsu no Baai
") will get an anime movie adaptation. The cast information will be announced on August 1st with the release the manga's 8th volume.
The franchise has been adapted into two OVAs
in March 2011 and then two seasons
of TV anime series in April and October of the same year. The light novel "Sekaiichi Hatsukoi: Yokozawa Takafumi no Baai" is a spin-off series that started in 2011.
Source: Cover of Light Novel vol.4
Sekaiichi Hatsukoi Movie