Plot Analysis Summary
A destructive household scheme turns sexual jealousy, financial dependence, and concealed violence into a chain of deaths and a misleading official verdict.
Story Structure — 5 Plot Phases
Virility and Manipulation
Kenji confronts waning virility and turns to hormone injections. He also attempts to use Kimura's interest in the household as a remedy for his jealousy.
Key Events
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Kenji's Failing Virility — Kenji struggles with waning virility within his marriage. Characters: Kenji Kenmochi
Location: Kenji's household
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Hormone Treatment Begins — Kenji has his doctor administer hormone injections. Characters: Kenji Kenmochi
Location: Medical setting
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A Dangerous Experiment — Kenji develops a plan involving Kimura and his marriage. Characters: Kenji Kenmochi, Kimura
Location: Kenji's household
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Kimura Enters the Scheme — Kimura becomes connected to Kenji's family through the engagement. Characters: Kenji Kenmochi, Kimura
Location: Kenji's household
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The Money Motive — Kimura's primary ambition is financing his continued studies with Kenji's money. Characters: Kimura, Kenji Kenmochi
Location: Kenji's household
The Jealous Experiment
Kenji's plan entangles Kimura with the family while Kimura remains motivated by access to Kenji's money. The apparent scheme for restoring manliness becomes increasingly destructive.
Key Events
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Jealousy as Medicine — Kenji expects jealousy to restore his manliness. Characters: Kenji Kenmochi, Kimura
Location: Kenji's household
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The Marriage Triangle — Kimura's interest becomes entangled with Kenji's marriage. Characters: Kenji Kenmochi, Kimura
Location: Kenji's household
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Treatment Brings Collapse — Kenji's hormone treatment is linked to his deteriorating condition. Characters: Kenji Kenmochi
Location: Kenji's household
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Kenji Suffers Heart Failure — Kenji dies of heart failure caused by the hormone injections. Characters: Kenji Kenmochi
Location: Kenji's household
Inheritance After Death
Kenji dies of heart failure caused by the hormone injections. After the funeral, Kimura becomes part of an uncertain plan to establish a new household.
Key Events
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The Funeral — Kenji's death is followed by his funeral. Characters: Kenji Kenmochi, Kimura
Location: Funeral setting
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A New Household Plan — After the funeral, a plan forms to live together. Characters: Kimura
Location: Kenji's household
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Uncertain Romantic Future — It remains unclear which woman, or whether both, will share Kimura's bed. Characters: Kimura
Location: Kenji's household
The Poisoned Meal
The proposed new life begins with a post-funeral meal. A mistaken container switch changes the intended poison, but Hana then uses the actual insecticide to poison everyone.
Key Events
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The Post Funeral Meal — The household begins its proposed new life with a meal. Characters: Kimura, Hana
Location: Dining room
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Poison Is Prepared — A poison tea is prepared using a powder believed to be insecticide. Characters: Kimura
Location: Dining room
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The Containers Were Switched — The supposed poison is actually harmless household cleanser. Characters: Kimura
Location: Dining room
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Hana Uses Real Poison — Hana poisons the household with the actual insecticide. Characters: Hana, Kimura
Location: Dining room
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The Household Dies — Hana's poisoning results in the deaths of the household members. Characters: Hana, Kimura
Location: Dining room
Diary and False Verdict
The diary reveals the incestuous love quadrangle behind the household crisis. Although Hana confesses, the detectives attribute all three deaths to suicide.
Key Events
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The Diary Is Read — Detectives read a diary documenting the incestuous love quadrangle. Characters: Kimura
Location: Detective setting
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The Quadrangle Emerges — The diary exposes the hidden emotional structure behind the deaths. Characters: Kenji Kenmochi, Kimura
Location: Detective setting
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A Suicide Ruling — Despite Hana's confession, detectives attribute all three deaths to suicide. Characters: Hana, Kimura
Location: Detective setting
A middle-aged husband of a younger woman finds her youth intimidating to the point that he cannot become aroused. His solution involves the introduction of his daughter's lover to his wife.