A manga page shows an older sister unable to remember something important and her younger sister trying to guess, set against comic panels

Prompt

Create one page of manga featuring these two people. White background, black lines.
Manga theme: an older sister who just can't remember something important, and a younger sister who can't guess what it is.
The manga panels progress from the upper right to the lower left.

この2人が登場するマンガの1ページを作成｡白背景に黒ライン｡
漫画のテーマ：何か大事なことをどうしても思い出せない姉と､それを当てられない妹
漫画コマは右上から左下へ進行する｡