В плавательном бассейне, флагов нет

After Sena is caught playing an eroge and insists it's not perverted, Yozora has her read out the dialogue aloud to prove otherwise. Meanwhile, Kodaka's little sister, Kobato, feels jealous that Kodaka is spending more time with the Neighbors Club than with her. After encountering a swim-happy character in her game, Sena asks Kodaka to teach her how to swim. After the swimming lesson, Sena gets herself into trouble when she insults some guys hitting on her, forcing Kodaka to help her out. The incident reminds Kodaka of a friend he once had as a child, who taught him a lesson about friendship that Yozora strangely reacts to.