"Extract" is a manga series that explores themes of identity, memory, and the ethical implications of scientific advancement. The narrative centers around a near-future society where advanced biotechnology allows for the extraction and transfer of human memories. This technology, initially developed for medical and therapeutic purposes, becomes a tool for exploitation and manipulation as corporations and individuals seek to profit from the memories of others.

The protagonist, a young man named Haruto, works as a "memory extractor," a specialized technician who retrieves and processes memories for clients. Haruto is skilled but emotionally detached, viewing his work as purely transactional. His perspective shifts when he encounters a mysterious woman named Aoi, whose memories are fragmented and contain dangerous secrets. Aoi’s memories reveal the existence of a clandestine project that experiments on human subjects, erasing and rewriting their identities for unknown purposes.

As Haruto delves deeper into Aoi’s memories, he uncovers a conspiracy involving powerful corporations and government entities. The project, codenamed "Extract," aims to create a new class of individuals whose memories can be controlled and weaponized. Haruto becomes a target as he attempts to protect Aoi and expose the truth. Along the way, he grapples with his own past, which is intertwined with the origins of the memory extraction technology.

The story is driven by a blend of suspense, action, and philosophical inquiry. Key characters include Haruto’s mentor, Dr. Saito, who harbors guilt over his role in developing the technology, and a rival extractor named Kaito, who represents the darker side of the industry. The narrative raises questions about the nature of selfhood and the consequences of tampering with human consciousness, while maintaining a fast-paced plot with twists and moral dilemmas. The series balances its speculative elements with grounded character development, creating a compelling exploration of its central themes.