The novel explores the life of a young man living in post-World War II Japan who grapples with his homosexuality in a society that does not accept it. The protagonist must wear a metaphorical mask to hide his true identity and desires, leading to a life of self-denial and inner turmoil. The narrative delves into themes of identity, sexuality, societal expectations, and the struggle for self-acceptance.

The narrative delves into the life of a troubled man who feels disconnected from society, viewing himself as fundamentally different from those around him. Through a series of notebooks, he recounts his life story, detailing his struggles with alienation, social anxiety, and a deep sense of personal inadequacy. As he grapples with his own identity and the expectations of others, his journey is marked by failed relationships, substance abuse, and an ongoing battle with his inner demons. The protagonist's quest for understanding and his inability to find his place in the world ultimately lead him down a dark and self-destructive path, reflecting a poignant exploration of the human condition and the difficulty of truly connecting with others.

"The Hunting Gun" is a poignant tale set in post-war Japan, revolving around the lives of three women who unknowingly share a common bond, a man with whom they are all involved. The man's secret love affairs and the emotional turmoil they cause are revealed through letters from each of the women. The narrative explores themes of love, betrayal, and the complexities of human emotions, painting a vivid picture of the human condition and the consequences of hidden passions.