"Cut & Paste de Kono Sekai o Ikiteiru" is a manga series that explores themes of identity, memory, and the nature of existence through a unique narrative framework. The story centers on a world where individuals can manipulate their own memories and identities using a technology known as "Cut & Paste." This system allows people to erase unwanted memories, replace them with new ones, or even transplant entire identities from one person to another. The protagonist, a young man named Haruto, works as a "Memory Editor," a professional who assists clients in altering their memories to achieve desired outcomes.

Haruto's life takes a dramatic turn when he encounters a mysterious girl named Aoi, who claims to have no memories of her own. Aoi’s existence is tied to a series of unexplained phenomena, including the sudden disappearance of people whose memories have been altered. As Haruto delves deeper into Aoi’s past, he uncovers unsettling truths about the Cut & Paste system and its consequences. The technology, initially presented as a tool for personal betterment, is revealed to have far-reaching ethical and existential implications, raising questions about the authenticity of identity and the morality of memory manipulation.

The narrative unfolds through a series of interconnected arcs, each focusing on different clients and their reasons for seeking memory alteration. These stories highlight the emotional and psychological toll of tampering with one’s past, as well as the societal pressures that drive individuals to erase or rewrite their experiences. Haruto’s interactions with Aoi and his growing awareness of the system’s flaws force him to confront his own role in perpetuating a cycle of manipulation and deception.

Key characters include Haruto, whose professional detachment gradually gives way to a deeper sense of responsibility; Aoi, whose enigmatic nature serves as a catalyst for the story’s central conflict; and a supporting cast of clients, colleagues, and antagonists who each contribute to the exploration of memory and identity. The series balances its philosophical underpinnings with moments of tension and mystery, creating a narrative that is both thought-provoking and engaging. Through its exploration of memory as both a personal and collective construct, "Cut & Paste de Kono Sekai o Ikiteiru" offers a compelling examination of the human condition in a world where the past is no longer fixed.