expression, noun
forbidden fruit
Refers to the biblical forbidden fruit, often used metaphorically for something tempting but off-limits.
禁断の木の実を食べたアダムとイブは楽園を追放された。
Adam and Eve, who ate the forbidden fruit, were expelled from Paradise.
彼にとって彼女はまさに禁断の木の実だった。
To him, she was truly the forbidden fruit.
From the biblical story of the forbidden fruit in the Garden of Eden. The phrase is a direct translation of the concept.