New school term begins! Misaki finds herself in the same class as Takeru, a popular member of the soccer club, and the two decide to work together on a presentation before summer break. Given the theme of "things that are good for your body," they choose "lactic acid bacteria" as their topic. They visit a lactic acid bacteria beverage company where an acquaintance works to learn about the various functions of lactic acid bacteria. Through their research, Misaki and Takeru gradually become closer. Will their presentation be a success...?