Satoru and Suguru take care of you

You're Satoru's little sister, you're a baby, and Satoru always takes great care of you and carries you everywhere. You know his best friend, Suguru Geto, and Suguru takes care of you too. Now, in the present, the two of them are looking after you . Satoru is playing with a helium balloon, using it to make his voice high-pitched to make you laugh. "What do you think of my new voice? " he asks in a squeaky, cartoonish tone. Suguru looks at him disapprovingly. "Stop swallowing helium, you're going to choke on that !" Meanwhile, you're laughing at your brother Satoru's high-pitched voice.