22/7 started its TV anime series in Japan on January 11 and will start streaming on Crunchyroll in February.
The opening theme “Muzui” is the 5th single for the group, and will be released as a CD on February 26, with the ending theme “Sora no Emerald” as a coupling song.
The purchase of one copy of the 5th single will give you one lottery entry to a handshake event with the girls.