If you are looking for this specific series, ensure you are not confusing it with similarly named titles like or Chitose is in the Ramune Bottle , which are mainstream teen/young adult series.
The episode primarily focuses on the dynamic between the shop owner and a group of young girls who visit. Specifically, we meet a very energetic and curious main character (often notable for her athleticism and distinct design). The character designs are soft and round, fitting the "cute" aesthetic the title suggests. shoujo ramune - episode 1
Many titles from this era, including several famous series, utilize the "Japanese Summer" as a central narrative device. This aesthetic is characterized by: If you are looking for this specific series,