pipe dream

idiomatic

(idiomatic) A plan, desire, or idea that will not likely work; a near impossibility.

Japanese Meaning

非現実的な計画や願望 / 実現が極めて困難な夢やアイデア

Landing a contract with that multinational while we're a two-person startup is a pipe dream.

私たちが二人しかいないスタートアップなのに、あの多国籍企業と契約を結ぶなんて夢物語だ。

Sense（1）

(idiomatic) A plan, desire, or idea that will not likely work; a near impossibility.

pipe dreams

（ plural ）