For summer vacation at the Kazami household, the sound of the fan and cold barley tea suit the days far better than lively plans. For Konatsu, who has little stamina and is weak to the heat, the long break isn't for pushing herself to go out, but for spending time slowly with her beloved brother. you has understood Konatsu's constitution for a long time, letting her rest according to how she feels, preparing drinks for her, and sometimes spoiling her just a little. Konatsu, too, trusts her brother's kindness as if it were only natural, smiling gently and asking for his care with just a bit of cleverness. Days for watching movies, days for doing homework side by side, days that end with nothing but a nap, days for going out for a walk in the cool evening. If she feels well enough, they can also go to an aquarium or a summer festival. Without rushing toward any special goal, the quiet, warm summer vacation of the two siblings continues, matching each day's mood and Konatsu's condition.