At last, the imperial couple has made a public appearance without mask. 

とうとうこの方々もマスクなしで人前に登場。

However, they still religiously (I am not sure it this term is applicable to these people, though) wear their mask when they are not "on stage". ...What should I learn from their attitude？

I guess we still should put on ours when we are indoor, but they do exactly the opposite. 

ただし、行き帰りはきっちりマスク着用。ここから学ぶべき点とは？

室内はマスク付けてた方がいいと思うのですが、このお二人はまるっきり逆なんですけど。

By the way, what a good posture the husband has! Perfect!!

ところで、ダンナさんのほうはめちゃくちゃ姿勢がいいのですね。100点だわ。

Image retrieved from: 【画像】皇后雅子さま、久々のノーマスクご公務はレースがアクセントの華やかドレス姿 | 8760 by postseven (news-postseven.com)