Eriko Miura has faithfully loved and supported her husband, Hiroshi, a sales representative, throughout their ten-year marriage. One evening, Hiroshi returns home with his outstanding subordinate, Kenji. During a family dinner meant to strengthen their bond, Kenji's gaze lingers on Eriko for an uncomfortably long time. Becoming aware of his stare, Eriko begins to feel an inner uneasiness. Is her connection with her husband weakening, or is a new emotion starting to emerge? The story begins here.