The official website for Shueisha's Cocohana magazine is listing that Setona Mizushiro's Nōnai Poison Berry (Poison Berry in My Brain) will end in the magazine's May issue, which will ship in Japan on March 28. The announcement also mentions that the issue will reveal more information on the live-action film adapting the series.

Mizushiro launched the series in Shueisha's Chorus women's magazine in 2009, and continued the series when the magazine relaunched as Cocohana. The series was ranked among the top 20 manga for female readers by Takarajimasha Inc.'s Kono Manga ga Sugoi! 2013 guidebook, and it won a jury selection prize at the 17th Japan Media Arts Festival Awards in 2013. The fourth compiled volume shipped in September.

http://www.animenewsnetwork.com/news/2015-02-28/nonai-poison-berry-manga-ends-in-march/.85463

its cold down here fam ~