Choki

Naoto Hatano works as a hairdresser at his shop "Hatano" located in a shopping district in Wakayama. He enjoys music and coffee. His wife Kyoko teaches a calligraphy class in the same building as her husband's beauty salon. Saki Seto is a 7-year-old girl who attends Kyoko’s calligraphy class. She is a troubled child, but Kyoko, who doesn't have a child, cares about Saki like a real daughter. Years later, a phone call is answered at "Hatano." The person calling is Saki Seto. Naoto Hatano has not seen her in 10 years due to an incident. Also, his wife passed away 5 years ago. Saki Seto is now all grown up, but she has lost her eyesight completely. What happened to Saki over the past 10 years?
(Source: Asian Wiki)