Miki is the fiancée of Souta, a man originally from Sōka who had been living and working in Tokyo. The couple decides to move to Sōka, prompting Souta to return alone to his hometown to find them a new home.

As Souta searches for a house, his story involves an encounter with a mysterious bird and a woman named Akiko, who has time-slipped from the past. He shows her the changed city, during which she contemplates the transformed landscape and her own future engagement. Miki is not present for these events in Sōka. The information provided does not include details about Miki’s personal history, occupation, personality, or any direct role in these occurrences beyond her relationship to Souta and their planned move.