account of a dream; dream narrative
A straightforward telling or recounting of a dream one had.
As soon as I woke up, I told my family about last night's dream.
fantastic story; wild tale; pipe dream
Used for an unrealistic, fanciful, or exaggerated story, often implying it is as insubstantial as a dream.
His success story sounds like a pipe dream.
Compound of 夢 (yume, 'dream') and 語り (katari, 'telling, narrative'). The reading ゆめがたり is a standard rendaku form.