singNsong is the credited author of the original web novel Omniscient Reader's Viewpoint, a South Korean fantasy series that has expanded into a global multimedia franchise. The name represents a collaborative duo of two writers who work together under this single pen name, with the partnership referring to themselves individually as Sing and Song within the creative process. The web novel was first published serially on the Korean platform Munpia, beginning on January 6, 2018, and concluding on February 2, 2020. Prior to creating Omniscient Reader's Viewpoint, the duo had completed previous work together but found themselves in a writing slump, uncertain about what story to tell next. This period of uncertainty led them to reconsider storytelling from the perspective of readers rather than writers, which became the foundational concept for their most famous work.

The central premise of Omniscient Reader's Viewpoint follows Kim Dokja, an office worker who has spent a decade as the sole reader of a web novel titled Three Ways to Survive in a Ruined World. When reality suddenly transforms to match the fiction he has been reading, Dokja becomes the only person who knows how the story unfolds, using his unique knowledge to survive and reshape the ending. The series explores metafictional themes about the relationship between readers, stories, and the act of reading itself. In an interview, singNsong explained that the story originated from long-held deliberation about what reading means to people who enjoy written stories, noting that they wanted to approach the narrative from the perspective of a person reading rather than from the perspective of a writer creating.

Beyond Omniscient Reader's Viewpoint, singNsong is also the original story creator for The World After the Fall, another web novel that received a webtoon adaptation. The duo has indicated that while there were no elaborate plans initially for the two works to crossover, they intentionally left room for the worlds to interact, and those connections developed organically over time. They have also mentioned having several ideas for future works, though these are likely to be indirectly connected to their existing stories rather than direct sequels, with characters from previous works possibly appearing as cameos. Library catalog records confirm that singNsong is credited as the original story creator for both Omniscient Reader's Viewpoint and The World After the Fall in published English editions.

The artistic identity of singNsong is deeply rooted in philosophical and literary theory. The duo has cited works such as Roland Barthes's A Lover's Discourse and Pierre Bayard's How to Talk About Books You Haven't Read as significant influences that helped establish the thematic foundation of their storytelling. References to these thinkers appear within Omniscient Reader's Viewpoint itself, including the use of Anticipatory Plagiarism as the name of a character's skill. When asked about the message they wanted to convey, singNsong responded that they hoped to express the idea that people can become each other's stories, helping one another endure the hardships of life, and that everyone deserves to have such a story.

The adaptation history of singNsong's work demonstrates significant industry reach. Omniscient Reader's Viewpoint was adapted into an ongoing webtoon illustrated by the artist collective Sleepy-C, which launched on Naver Webtoon in May 2020 and on Line Webtoon in English beginning August 2020. The webtoon is published in English by Ize Press, an imprint of Yen Press. An anime television series adaptation has been announced, produced through a collaboration between Crunchyroll and Aniplex. Additionally, a live-action film adaptation directed by Kim Byung-woo and distributed by Lotte Entertainment is scheduled for release in July 2025, starring Ahn Hyo-seop as Kim Dokja and Lee Min-ho as Yoo Joonghyuk. The English print edition of the original novel was released by Yen Press beginning July 22, 2025.

The industry significance of singNsong is evident in the international reach of their work. In an interview, the duo expressed amazement that their stories have reached readers in countries they have never personally visited, noting that Omniscient Reader's Viewpoint has been published in multiple languages including Thai, Chinese, and Taiwanese editions, with English physical volumes following later. The series has amassed substantial readership numbers, with the webtoon adaptation alone accumulating over 441 million views as of February 2025. When asked about Kim Dokja discovering that his own life might be a novel being read in another world, singNsong responded that Dokja already understands that the story of someone else's life can save another person, and that if his story can provide meaning to someone living in another timeline, he would gladly accept it. This response reflects the recursive, self-aware quality that defines singNsong's approach to narrative and their understanding of the relationship between creators, stories, and audiences.