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.

A cat-like alien from a distant galaxy, MuuMuu, arrives on Earth. His goal is to learn about home appliance technology on Earth to recover the technology his species has lost. The protagonist, Sakurako, has a typical university life, but everything changes with MuuMuu's arrival! What begins as an unexpected cohabitation quickly turns into a whirlwind of chaotic events. The chemistry between Sakurako and MuuMuu leads to a super-spectacular, appliance-filled, and cat comedy adventure.