daydream is the fourth studio album released by Aimer.

It was released in three versions: a limited CD+Blu-ray (Type-A), a limited CD+DVD edition (Type-B), and a regular CD only edition.

The song "Falling Alone" was used as the lead track and was previously released as her 10th digital single as advance of the album[1] The album charted #2 daily rank for first week.

It charted so far 34 weeks and sold more than 78,000 copies.

[2] The album was certified Gold by Recording Industry Association of Japan in March 2017 for shipment of 100,000 copies.