Yuki was born when Naoko was 20 years old. Her father disappeared, and Naoko raised her single-handedly despite the opposition of those around her. She was sometimes kind and sometimes strict, raising her Yuki as her mother and her father's surrogate. Thanks to her, Yuki got a job safely and ended up living in her dormitory. After that, time passed, Yuki got a long holiday and decided to go home for the first time in a long time, and Naoko took her on a hot spring trip without entering the water.
