Kazumi is 37 years old. Once a bright and studious girl, she was caught in a tragic series of events—the death of her beloved mother and the violent abuse from her alcoholic father. Despite her hard work and acceptance into ●● High School, her father refused to support her, spending all the family's money on alcohol and lashing out violently. Relatives, appalled by the situation, intervened, leading to Kazumi being placed in a care facility. However, the facility was rife with bullying, and there was no environment conducive to studying. Financial hardship forced her to give up her dream of attending university. Entering society, Kazumi eventually found ordinary happiness through love, marriage, and the birth of her daughter. Yet, as she approaches her forties, a certain decision begins to trouble her. Citing her status as an only child, she embarks on a journey to reflect on her life. Along the way, her encounter with a stranger ignites an intense inner turmoil.