SIREN: Akai Umi no Yobigoe

A manga created by Wataru Kamio, it was initially published in Shin Mimibukuro Atmos from July 2014 to December 2015. Intended to transition online in April 2016, its release was halted indefinitely due to the author's health issues, leading to its cancellation and replacement by another series. The manga is overseen by the original developers and aligns with the narrative of the first Siren game, including some content not featured in the game. A physical and digital compilation of the first seven chapters was released, including an interview with Mitsuyoshi Shinoda. A spin-off exploring the background of Tamon Takeuchi and Yoriko Anno's relationship, written and illustrated by Tsutomu Sakai and Shinya Iiboshi, was published in October 2016.