The original Oboreru Knife manga ran from 2004 to 2013 in Kodansha’s Bessatsu Friend shōjo manga anthology magazine.
Oboreru Knife is directed by Yuki Yamato and stars Nana Komatsu as Natsume and Masaki Suda as Kouichiro.
The teaser trailer and movie poster for Oboreru Knife (“The Drowning Knife”), a live-action film based on the shōjo manga by of the same name by George Asakura, are now available online.