I'm not entirely sure which specific 'no longer human real story' you are referring to. There could be various interpretations. It might be related to a personal account of someone feeling alienated or detached from humanity, perhaps due to trauma, mental health issues, or a series of life experiences that made them feel like they no longer fit into the normal concept of being human.
Think of a scientist who becomes obsessed with unethical experiments. In the pursuit of knowledge, they cross moral boundaries that are fundamental to human values. As they continue down this path, they start to lose their sense of right and wrong, and their relationships with others deteriorate. Their focus on the experiment becomes all - consuming, and they gradually become detached from the normal human community and the qualities that make us human. They may start to view people as mere subjects for their experiments rather than fellow human beings, which gives the impression that they are no longer human in the moral and empathetic sense.
Yes, 'No Longer Human' is somewhat based on the author Osamu Dazai's own life experiences, which could be considered as having elements of a true story. Dazai had his own struggles with mental health, identity, and his place in society, and these are reflected in the novel.
It depends on personal preference. If you like visual storytelling, the manga might be more engaging as it shows the characters and scenes directly. But if you enjoy delving deep into a character's psyche through detailed text, the novel could be more appealing.
The medium - specific elements also play a role. The 'no longer human' novel uses only words to create the atmosphere, while the manga can use different art styles, shading, and paneling to set the mood. For instance, a dark and shadowy art style in the manga can enhance the sense of gloom and despair that the story often conveys, while in the novel, it's the language and the sequence of events that build up such emotions.
The self - destructive tendencies in the story are related to Dazai's real - life experiences. He had a difficult life filled with addictions and failed attempts at finding meaning. In the novel, the protagonist's downward spiral is an echo of Dazai's own life journey. Also, the complex relationships depicted, especially the ones filled with disappointment and misunderstanding, are likely drawn from Dazai's own relationships.