Tohko is typing the keyboard of the computer before her.
This was a sort of memorial written about a trip Tohko had gone on with Sumire, who was one of her best friends. They got to know each other in their highschool days and their friendship had continued so far.
It was when Tohko ended up sleeping almost all day long after having been laid off from a job. Tohko had worked at a publishing company in Tokyo until coming back to her own hometown lately. In those days, she lived in her parental house without working and most of her life was getting to be occupied by sleeping like a coma.