After ending the rain with her first Sakura Card, poor Sakura is wiped. She can’t even sit up in bed! Thankfully, she doesn’t have a fever, and Sakura assures her dad and brother that she’ll be fine. Touya, who has a sense for magical things without being an active participant in that world, assumes “something has happened” to cause the fatigue.
Sakura misses cupcake-making in home ec, but Tomoyo knows that a visit from her and a bashful Syaoran is just what the doctor ordered, while Syaoran can’t help but stare daggers at an increasingly suspicious Eriol. Similarly, a Yukito suddenly eating far more than usual gets a knowing, not-at-all friendly look from Nakuru, who competes for Touya’s attention by kicking ass at basketball.
When Tomoyo and Syaoran show up with sweets, Sakura is awake, alert, and back to her chipper self, and Syaoran can’t help but blush at her smile and earnest thanks, while Kero is amazed “the kid” was able to make something so tasty. Kero also deduces that Sakura’s fatigue was caused by her instinctively converting the card along with her wand, using a new magic circle in which the star (not the sun or moon) is most prominent.
Kero warns that since Sakura is relying on only her own power (no longer Clow’s) to release and use the cards, it’s going to be tough going. Even worse, he and Yue were stopped in their tracks even in their true forms, something only their master (Sakura) and Clow himself should be able to do.
Back at school while writing a letter to Mizuki-sensei, Sakura hears a lovely tune being played on the piano and discovers it’s Eriol on the ivories. Sakura is heartened and soothed by the music, and when Tomoyo shows up, she suggests Eriol accompany Tomoyo as she sings a new song. While playing, Eriol does…something magical and fishy to the piano.
That evening, while Sakura and Syaoran are walking in the hall wondering what to make of recent events, they hear Tomoyo singing, followed by a scream and a loud noise: the grand piano in the music room has decided to start moving on its own, and it’s gone berserk! Sakura grabs Tomoyo and they run from the pursuing piano, which Syaoran damages but doesn’t destroy with his thunder sword.
Eventually Tomoyo determines the piano is following her voice every time she speaks, which gives Sakura an idea for how to defeat it for good. Assembling on the roof, she asks Tomoyo to sing once more in order to lure the piano to their location. Then she releases the Song card, converts it to a Sakura Card, and uses its ability to copy Tomoyo’s voice to lure the piano off the edge of the roof to its destruction.
All’s well that ends well, but once again Sakura is completely wiped out by the magical exertion, and passes out in Syaoran’s arms. We then pull back from the school to see that our trio of shadowy villains has been watching. The central figure—who let’s be honest, is Eriol—declares that this is going to be “fun”. Sakura passed another one of his tests, but he doesn’t seem the type to keep going easy on her!