The Absent Mother and the Waiting Family
Bullet TrainWataru’s coma reorganizes the family around bedside care, while the absent presence of Yuichi’s former wife deepens his sense of responsibility and loss.
increasing
Bearing strength in each event
decreasing
A Family Already Frayed

A Family Already Frayed
Care under strain
Kimura raises Wataru after his wife leaves, and his parents criticize his drinking and the limited life he provides for the boy. Their arguments reveal a family that cares but does not communicate easily.
Wataru’s dependence makes Kimura’s failures more consequential. The father’s private justifications cannot conceal that the child has already become alert to his drinking and moods.
A Hospital Room of Witnesses

A Hospital Room of Witnesses
Shared vigil
Kimura stays near Wataru’s bed, changing his clothes and tending to him while other families keep watch over their own children. Their quiet sympathy makes him feel part of a community despite his usual isolation.
When Kimura must leave for the train, he trusts those parents to help. The hospital’s small network of care becomes a counterpoint to the Prince’s solitary threats.
The Family Is Reunited

The Family Is Reunited
Care survives the crisis
Shigeru and Akiko learn that Wataru has woken and report the news to Yuichi. Later, Nanao hears that Wataru is with his father, a quiet image of recovery after the train’s violence.
The story does not erase the rooftop fall or the family’s earlier strain. It closes this thread with a living child surrounded by relatives who have acted to protect him.
Before the rooftop fall, during Kimura’s single-parent life
During the month and a half after Wataru’s fall
After Wataru wakes, near the novel’s ending