Momoiro Sisters Season 1 Episode 4 Probably One Day... ( Air Date 1998-09-08 ) Genre Animation, Comedy category. Overview "Momoko is a high school student, trying to live up to her older sister Sakura. Sakura works in an office along with many other co-workers. The two sisters, and their friends, experience the everyday hardships and situations of being a woman. (Source: ANN)".