The April 2019 issue of Shogakukan’s Betsucomi magazine has announced that Kanoko Sakurakoji will pen a new one-shot chapter for the Black Bird manga in the magazine’s next issue in April 2019.
VIZ Media published the manga in North America and describes the story as:
There is a world of myth and magic that intersects ours, and only a special few can see it. Misao Harada is one such person, and she wants nothing to do with magical realms. She just wants to have a normal high school life and maybe get a boyfriend.
All that changes one day when Misao is attacked by a demon. Her childhood friend Kyo suddenly returns to save her and tend to her cuts – with his tongue! It turns out Misao is the bride of prophecy, whose blood gives power to the demon clan who claims her. But most demons want to keep her power for themselves – by eating her! Now Misao is just trying to stay alive… and decide if she likes it when Kyo licks her wounds.
Sakurakoji launched the manga in Betsucomi in 2007, and ended it in December 2012 with 12 volumes.