D88EC7E8-E3FB-4F6D-A2CE-00F7A1C48C48@1xCreated with sketchtool.

共有

数学上手の茜ちゃん「無限に続く足し算ってなんなの?」2(終)

Twitterline
https://nico.ms/sm39621523?ref=thumb_watch