It’s CCS’ first beach episode! That means ample chances for Sakura to show off her talent for swimming as well as potato peeling during dinner prep. Turns out Syaoran is pretty good at swimming (and chopping) as well, giving the impression that everything involving him and Sakura is an competition, unspoken or otherwise.
For all of Sakura’s strengths, she’s an incurable scaredy-cat—far more than any of her friends—so when Naoko tells a chilling ghost story about a shrine in a seaside cave where students vanished, she can’t sleep and wanders the grounds after lights-out. That’s when she encounters Syaoran, who is relatively nice for once! The two are able to simply sit together on the beach and talk, keeping each other company.
The next evening is the class test of courage, which ends up bearing an uncanny resemblance to Naoko’s tale. A skittish Sakura must cling to Tomoyo in the cave at all times, and lets out a blood-curdling HOEEEE when a teacher jumps out of the shadows wearing a sheet. But things get scary for realty when Naoko, Rika, and Chihiru all vanish before their eyes!
Soon even Tomoyo disappears, leaving Sakura all alone and a terrified wreck—until Syaoran shows up to help her calm down and gather the courage and focus needed to detect the Clow Card responsible for the vanishings. Using Float to cross the burned bridge, she manages to capture Erase, and even offers it to Syaoran, stating that she’d have remained a mess had he not helped her.
However, Syaoran declines, saying Sakura earned the card fair and square. He may still be a pompous jerk at times, and the two may still be crushing on Yukito by episode’s end, but this was another key early episode in their steady development of their relationship as friends and allies (and someday more!) who can rely on each other in a pinch.