With her dislike of Yuzu and Mei's relationship, Matsuri uses the secret photo she took at the shopping mall to blackmail Mei into fooling around with text-pal on Christmas. Meanwhile, Yuzu knows nothing of this and struggles to bake a cake for her first Christmas together with Mei. While her excitement builds, Mei comes home and breaks the news that she won't be able to join their Christmas Party due to student council work...
Well, thanks for playing 
with me, my big sisters.
Na ja, danke, dass ihr Zeit mit mir
verbracht habt, meine großen Schwestern.
Bueno, gracias por jugar conmigo,
hermanas mayores.
Bueno, gracias por jugar conmigo,
hermanas mayores.
Merci d’avoir passé
la journée avec moi,
Grazie mille per essere uscite con me!
Bom, obrigada por brincarem
comigo, irmãs mais velhas.
Ну, спасибо, что поиграли
со мной, сестрицы.