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...
I'm really dense, and a bad older sister.
Ich kapier einfach nichts und bin ’ne
verdammt miese große Schwester.
Soy muy lerda, y una mala hermana mayor.
Soy muy lerda, y una mala hermana mayor.
Tu parles d’une grande sœur,
je suis trop à l’ouest.
Sono davvero una sorella maggiore
tonta e pessima.
Eu sou muito tonta,
e uma irmã mais velha horrível,
Я никчёмная и глупая сестра.