Suzumu (スズム) is the storyteller behind the mysteries of the Bookmark of Demise series. He is known for arranging and mastering music.
Suzumu is a producer most notable for making arrangement covers for both VOCALOID and non-VOCALOID works. Examples for VOCALOID covers would be Neru's "Tokyo Teddy Bear" and 150P's "Kodoku no Kakurenbo". As for non-VOCALOID works, he often collaborates with the utaite Soraru and Lon, and illustrators Saine and MACCO, in their circle, Asukasoromanya-z.
He is also known for his collabs with kemu, for the Pandora Voxx series as "SMC." However, he is a lyricist too, having written lyrics of the Bookmark of Demise Project. Later on, he began making his own VOCALOID original songs as well. His first song, in which he wrote both the music and lyrics, is "Hitori no Kimi to Hitori no Boku ni".
"Jinsei Reset Button" (GUMI) (Collab w/ kemu) (Nov.07.2011) with subtitles
"Invisible" (Rin & GUMI) (Collab w/ kemu) (Dec.20.2011) with subtitles
"Ikasama Life Game" (GUMI) (Collab w/ kemu) (Feb.08.2012)
"Roku Chounen to Ichiya Monogatari" (IA) (Collab w/ kemu) (Apr.11.2012) with subtitles
"Yaba, Tofu Kau no Wasureta" (Album Crossfade) (Apr.16.2012)