For Koutarou Murata, an overworked salaryman, his local ballpark is the only place where he can truly unwind from his arduous daily life. One evening, he is approached by Ruriko, the new lively beer vendor, trying to sell her first drink to him. Koutarou accepts Ruriko's offer, marking the start of their friendship and lots of playful teasing.

While Koutarou tries to enjoy baseball to the fullest and Ruriko diligently seeks for more customers, many fans with heartwarming stories of their own come to fill the ballpark and enjoy the space that brings them all together.