Yamashita, who is slightly neurotic and has a strong aversion to ants for a specific reason, finds himself with an unexpected guest—Shimabara. While Shimabara is an expressionless bug enthusiast, he insists on "watching over" the ants. Suddenly, living together seems like a possibility. Yamashita wonders how someone can invade his most vulnerable space, but Shimabara is unperturbed and carefree, and he finds his way into Yamashita's heart. This engaging and endearing story is just one example of the charming characters and romantic tales crafted by a talented author.