Michiru resides in Shichigahama, a coastal town struck by the 2011 Great East Japan Earthquake and tsunami. She belongs to a tight-knit circle of friends—Kaito, Nagi, Minato, and Yayoi, who recently moved from Tokyo. On March 11, 2011, intense tremors prompt Michiru and her companions to evacuate to higher ground immediately, heeding tsunami warnings. Their ascent mirrors real-life survival tactics used by Shichigahama residents during the catastrophe.

After the tsunami, Michiru takes refuge in an evacuation shelter alongside displaced townspeople, depending on emergency provisions. Three months post-disaster, she moves to temporary housing with fellow survivors. This relocation fractures her friend group as they scatter across separate temporary housing zones. Michiru confronts the prolonged hardships of displacement and splintered community ties wrought by the tsunami’s devastation.

Spanning a decade, the narrative traces her eventual reunion with friends upon their return to Shichigahama. Michiru’s journey maps the town’s physical and social metamorphosis throughout its extended reconstruction. Her story underscores resilience, community bonds, and the enduring significance of human connections amidst profound loss.