Fans have created many unofficial Suguri manga over the years, and this page exists to try and catalog them.
Listed on Doujinshi.org Edit
Hadaka no mama no yokbou de (裸のままの欲望で) [TL: With Naked Desire]
Burning Brave! (バーニングブレイブ!) [TL: BURNING BRAVE]
Tsundere Seven 21 (ツンデレセブン21) [TL: Tsundere Seven 21]
Nanako SOS! (ナナコSOS!) [TL: Nanako SOS!]
From Pixiv Edit
Daidai Daisuki! Mixed Juice! (だいだい大好き！ みっくすじゅ～すっ！) [TL: Orange Juice love! Mixed Juice!) was a compilation manga by multiple authors that also included a CD with 4 song remixes.