Eep, my shirt's on backward! Hold on, you already knew, didn't you? Why didn't you tell me? I literally just gave a big lecture looking like this! "Well, they say ignorance is bliss. I just figured it'd be best if I didn't say anything."
「わぁ。シャツが後ろ前になってる。ちょっと、気付いてたでしょ？何で教えてくれないの？こんな格好で子供たちに偉そうに説教しちゃったよ」「いやぁ、『知らぬが仏』って言葉もあるし。黙っとく方がいいかなぁと思って」