Mornings of the World

Eun Chae's grandmother visits her at her house. This is because Eun Chae's mother, who got divorced recently, suddenly went on a business trip abroad, and she needed someone to take care of Eun Chae, who is currently a 3rd year old high school student. However, her grandmother appears with her husband, who suffers from dementia, and they're off little to no help to Eun Chae.
(Source: Korean = Daum || Tranlation = MDL)