Hitoshizuku-P is a female Vocaloid music producer and original creator known for her narrative-driven songs, many of which have been adapted into manga series. Also known by the name Samo, she is a member of the creative circle teamOS, where she collaborates with illustrator Suzunosuke and composer and arranger Yama△.

Her career as a creator began with Vocaloid music, with her first album, Hitoshizukushi, released in 2009. This album featured songs using the vocal synthesizers Hatsune Miku and Kagamine Rin and Len, establishing her characteristic approach of weaving stories through piano-driven compositions. Her body of work includes several notable series, such as the Synchronicity series and the Night series, which includes the song Bad ∞ End ∞ Night.

The narrative worlds created in her music have been adapted into manga. She is credited as the story author for the manga Hatsune Miku: Bad∞End∞Night, which was illustrated by Tsubata Nozaki. Additional manga publications based on her work include Bad End Night and Himitsu - Kuro no Chikai.

Her artistic identity is defined by a focus on storytelling, frequently using the vocal duo Kagamine Rin and Len as central characters in elaborate, multi-part narratives. Her work is often developed in close collaboration with Yama△, who contributes to composition and arrangement, and Suzunosuke, who provides illustrations, creating a unified creative vision across her music and its subsequent manga adaptations.