Rie raised her son Tatsuya as a single mother after giving birth to him from an affair, desperately working as a career woman to ease his loneliness. Tatsuya, understanding their situation, never complained and helped with household chores, yet deep inside, he continued to carry a sense of loneliness. When Tatsuya entered college, Rie used her long-accrued paid vacation to take a trip with him to a traditional inn. But the moment they arrived, she found her thoughts drifting back to work, realizing that somewhere deep inside, she still couldn't escape reality.