比ひ翼よくの鳥とり

noun

happily married couple; lovebirds

Literary expression originating from Chinese mythology, referring to a pair of birds with one wing each that must fly together, symbolizing an inseparable married couple.

• あの二人ふたりはまさに比ひ翼よくの鳥とりのような夫ふう婦ふだ。

  Those two are truly a couple like the legendary birds that share a wing.