A girl's classmate disappears during a game of hide-and-seek. When she goes out to look for him, she hides when she hears someone pursuing her. After a while, she peeks out to see if her pursuer has given up.

This pilot is remembered, really, for one notable reason: this is Miyazaki's first time as a solo director. He teamed up with Takahata for the later episodes of the 1971-72 Lupin III series, but Yuki's Sun marked his first time solely in the captain's seat. Yuki's Sun was based upon a popular shoujo manga (girls' comic) by Tetsuya Chiba which was serialized in 1963. It involves a 10-year-old orphan girl who is adopted into a family. The storyline is somewhat complex, and seems to play out like grand melodrama. Chiba's stories were more sophisticated and grown-up than, say, Osamu Tezuka, who of course was the godfather of postwar Japanese manga.

The all-girls Kikyo Private Academy and Chidori Public High School are polar opposites. With its prestigious history, Kikyo is attended by noble young ladies from distinguished families, while Chidori is infamously full of simple-minded delinquents. It is no surprise that their students clash with their differences. Having a tall stature and fierce appearance, Chidori student Rintarou Tsumugi is often avoided by others despite his gentle heart. One day, while helping out at his family's patisserie, he meets a customer who, after a brief moment, runs away from him. The next day, the customer returns to apologize to Rintarou, introducing herself as the cheerful Kaoruko Waguri. After spending time with Kaoruko, Rintarou appreciates that she does not judge him based on his appearance and looks forward to when they will meet again. However, when Rintarou discovers Kaoruko attends Kikyo, their relationship will challenge the social expectations and dynamics around them.

Unaired episodes of the "Morita-san wa Mukuchi" TV series bundled with the 5th manga volume.