Agarthans’ prohibition on going to the surface

Agarthans’ prohibition on going to the surface is a law shaped by the danger of life above ground. Shun’s choice to cross that boundary—and his death afterward—shows the rule’s force not as an abstract restriction but as a limit with a mortal consequence.

Rule and Mortal Risk

The evidence links the prohibition directly to the danger the surface poses to Agarthans. While listening with Asuna, Shun reflects that he has long wanted to reach the surface, insisted on doing things his own way, and followed his teacher. He understands that going there invites an early death, but that knowledge has not extinguished his desire to go. The rule therefore stands against a wish Shun has carried for a long time, not an impulse formed only at the moment of departure.

Shun’s Transgression

Shun’s younger brother, Shin, later explains the connection between the law and Shun’s fate: Agarthans cannot survive long on the surface, and Shun went there anyway, breaking the law. The account establishes both deliberate transgression and awareness of danger; Shun had recognized the risk before going. It does not describe how the prohibition is enforced, but makes clear that the boundary is backed by a physical vulnerability, not merely a social penalty.

Confirmation and Consequence

When Asuna learns from Shin that Shun is dead, the news gives the earlier reflection its full weight. Shun’s awareness that surface travel could bring an early death becomes more than foreboding: his death confirms the danger his society’s rule addresses. Asuna turns the words over in her mind, while Shin appears not to notice her reaction. Through this contrast, the prohibition is presented as a fact with intimate consequences—one that Shun knowingly defied and that Asuna must now absorb.