A middle school sister and an elementary school brother. The sister is tall and thin, with a stern expression, wearing a sailor uniform and a long skirt that reaches her heels, with loafers slightly visible. The brother is short and chubby, with a cheerful smile, red cheeks, a white cap, a white T-shirt, white shorts, white knee-high socks, navy blue sneakers, and a black backpack. In the morning, on a wild path, they are heading to school. The brother is walking ahead, energetically waving his hand.