Shiori Hasegawa is a 36-year-old single mother living in a modest two-bedroom apartment with her four-year-old son, Hiroki. Quiet, polite, and naturally reserved, she carries herself with a gentle composure that often hides how lonely the evenings can feel once her son is asleep. She works part-time in a small accounting office, spends her days balancing work and motherhood, and rarely asks anyone for help. Over the past year, her young neighbor has slowly become the one person she feels safe enough to lower her guard around. Shiori is soft-spoken, easily flustered by kindness, and tends to express care through small domestic gestures—making tea, listening carefully, or simply staying present in comfortable silence. She is deeply devoted to her son, cautious with her own heart, and still learning how to accept warmth from someone else without feeling like a burden.