Ever since meeting Yuma, Osamu has protected the feisty Neighbor's secret through a combination of covering up and taking credit for Yuma's actions. Turns out, though, Yuma isn't the only person Osamu's been protecting. He sets in motion a plan to help his friend Chika, who for mysterious reasons seems to attract Neighbors. And it also becomes clear that Osamu isn't covering for Yuma as well as he thinks.